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FEED • Stack 9KEY
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Answer Key
Stack 9
Check your answers for all five Vaults!
Vault 1
Money & Smart Spending
💼
Vault 2
Earning, Saving & Goals
📋
Vault 3
Budgeting & Money Management
🏛️
Vault 4
Banking & Digital Payments
📈
Vault 5
Growing Money & Tax
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Published by INFINTRIX | Edition 1 | 2026
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FEED • Stack 9KEY
Vault 1:
Money & Smart Spending
Activity A: Read the Forex Board
1. $500 × ₹93.31 = ₹46,655
2. €200 × ₹109.98 = ₹21,996
3. £100 × ₹126.58 = ₹12,658
4. GBP — highest value per unit
5. Rupee weakens; oil imports become costlier
Activity B: EMI Calculator
1. Total EMI cost: ₹24,299. Extra vs cash: ₹2,299
2. Total: ₹48,000. Hidden interest: ₹3,000. Eff. rate: ~6.67%
3. GST on fee: ₹499 × 0.18 = ₹89.82. Total: ₹41,088.82. Extra: ₹3,088.82
Activity C: Fine Print Detective
1. Annual fee applies from Year 2 if spending < ₹50,000/year
2. Interest charges from Day 1 if full balance not paid by Month 6
3. Interest accrues from Day 1; only payment is deferred, not interest
Activity D: TCO Check-Up
1. ₹599 × 36 = ₹21,564
2. Wall mount/cables: add ₹3,500
3. Total TCO: 45,000 + 21,564 + 3,500 = ₹70,064
4. ~55.7% higher than sticker (₹25,064 extra)
5. Open — student judgement
Activity E: Quick Quiz
Q1: b) 24 hours, 5 days a week   Q2: b) Interest hidden in a higher product price   Q3: b) Sticker + running costs + maintenance + resale loss   Q4: b) Market forces, with RBI able to intervene   Q5: b) Small monthly subscriptions that silently add up
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Published by INFINTRIX | Edition 1 | 2026
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Vault 2:
Earning, Saving & Goals
Activity A: Product vs. Service
1. Priya’s pickles → Product
2. Rohan’s guitar lessons → Service
3. Sneha’s design work → Service
4. Ankit’s clay lamps → Product
5. Kaveri’s cleaning → Service
6. Vikram’s jute bags → Product
Products have inventory costs; services sell skills/time.
Activity B: Arjun’s P&L
Q1: Net Profit = ₹43,000 − ₹15,300 = ₹27,700
Q2: Largest expenses: Platform fees (₹4,300) & co-working space (₹4,000)
Q3: Arjun margin = 64.4% vs Kavita 18% — services have lower overhead
Activity C: Inflation Calculator
Year 2: ₹112.36
Year 3: ₹119.10
Year 5: ₹133.82
Year 10: ₹179.08
₹100 in Year 10 only buys 55.8% of today’s item — idle money loses value.
Activity D: Gig Economy Explorer
Open — evaluate skill, target customers, pricing, tools, costs, and expected income for realism and completeness.
Activity E: Quick Quiz
Q1: b) Service business   Q2: b) Revenue − Expenses   Q3: b) Short-term, flexible, freelance work   Q4: b) ₹212   Q5: b) Inflation erodes the value of idle money
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Published by INFINTRIX | Edition 1 | 2026
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FEED • Stack 9KEY
Vault 3:
Budgeting & Money Management
Activity A: My Zero-Based Budget
Answers vary. Total must = ₹8,000 with ₹0 remaining. At least 20–30% for savings (₹1,600–₹2,400). Sample split: Savings 2,000 + Education 1,000 + Transport 800 + Food 1,500 + Entertainment 800 + Investing 1,200 + Charity 400 + Misc 300 = ₹8,000.
Activity B: ZBB vs Traditional
Leftover: ZBB → none (all assigned); Traditional → untracked extra.
Detail: ZBB very detailed; Traditional broad.
Best for: ZBB → first earners / strict discipline; Traditional → stable expenses.
Discipline: ZBB high; Traditional moderate.
Flexibility: ZBB within categories; Traditional overall but less accountable.
Activity C: Fix This Budget
Priya’s current total: ₹4,800. Unallocated: ₹1,200. Redistribute ₹1,200 across savings/investing/emergency fund. Sample: +₹600 Savings, +₹400 Investing, +₹200 Emergency = new total ₹6,000.
Activity D: Case Study — Karan
Q1: Saves ₹500 × 12 = ₹6,000. Camera ₹25,000 — No, short by ₹19,000.
Q2: Sample ZBB — Camera fund ₹2,100/mo (₹25,200 in 12 mo).
Q3: Cut eating out (₹1,500 → ₹800) and gaming (₹1,000 → ₹300).
Activity E: Quick Quiz
Q1: b) ₹0   Q2: b) Allocate to savings before spending   Q3: c) ₹2,000   Q4: c) Reduce ₹200 from another category   Q5: b) Setting clear milestones and tracking progress
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Published by INFINTRIX | Edition 1 | 2026
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Vault 4:
Banking & Digital Payments
Activity A: Rate Credit Behaviour
1. HELPS — on-time payments (35% of score)
2. HURTS — high utilization (>30%)
3. HELPS — credit mix (10%)
4. HURTS — multiple inquiries (10%)
5. HELPS — credit age (15%)
6. HURTS — increases utilization + interest
Activity B: CIBIL Score Estimator
Priya: 750–900 (Excellent) — strong payment history, 25% utilization, 4-yr age, diverse mix, 1 inquiry.
Vikram: 300–549 (Poor) — missed payments, 90% utilization, short age, no mix, 3 inquiries.
Activity C: Responsible Borrowing
1. False — borrow only what you need
2. True — 40% EMI rule
3. False — higher CIBIL = lower rate
4. True — education loan moratorium
5. False — minimum due = high interest
6. True — compare rates
Activity D: EMI Affordability
Deepa: Max EMI ₹24,000. Can afford education (₹18,000); cannot afford home (₹35,000).
Sunil: Max ₹16,000 — cannot afford either.
Fatima: Max ₹40,000 — can afford both.
Sunil’s options: raise income, bigger down payment, longer tenure, or wait.
Activity E: Quick Quiz
Q1: c) 300–900
Q2: b) Payment history (35%)
Q3: c) Home loan
Q4: b) 40%
Q5: c) Ensures on-time payments, protecting score
⭐ Bonus: Real-World Investigation
1. CIBIL Check — Open (student records actual score).
2. Loan Ad Hunt — Open (list rate + fees).
3. EMI Audit — Open. Safe if total EMI ≤ 40% of income.
4. Compare — Open (cheaper = lower effective rate).
5. Predict — Higher rates, harder approvals, may need collateral.
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Published by INFINTRIX | Edition 1 | 2026
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FEED • Stack 9KEY
Vault 5:
Growing Money & Tax
Activity A: Read the Factsheet
1. NAV = ₹65.20
2. 3-year return = 11.2%
3. Risk level = Medium
4. Minimum SIP = ₹1,000/month
5. Expense ratio = 0.62% — reasonable (under 1% is good for active fund).
Activity B: Income Tax Calculation
Meena (₹5L): 87A rebate applies → Total Tax = ₹0.
Ravi (₹10L): Tax = ₹40,000 before rebate → 87A applies → Total Tax = ₹0.
Priya (₹16L): ₹1,20,000 (no rebate, income > ₹12L).
Activity C: Risk-Return Matching
1. Fixed Deposit → B (Low risk, ~7%)
2. Equity MF → D (High risk, 12–15%)
3. Direct Stocks → A (Highest risk)
4. Debt MF → E (Medium-low, ~8%)
5. Balanced MF → C (Medium, 10–12%)
Activity D: ITR Benefits T/F
1. False — file even if no tax due (refunds, visa, loans)
2. True — ITR needed for visas
3. True — banks ask 2–3 yrs ITR for home loans
4. True — excess TDS refunded only after ITR
5. False — deadline is 31st July
6. True — filed at incometax.gov.in
Activity E: Quick Quiz
Q1: b) Spreading investments across different types   Q2: b) Net Asset Value   Q3: c) 0% (Nil)   Q4: d) Direct Stocks   Q5: b) Income Tax Return
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Published by INFINTRIX | Edition 1 | 2026