Under the Full Down Payment (FDP) scheme, an immediate payment of INR 50 lakh is required. With an 8% rebate, the net FDP amount is calculated as:
\[
\text{Amount paid under FDP} = 50 \, \text{lakh} - 8\% \times 50 \, \text{lakh} = 50 \, \text{lakh} - 4 \, \text{lakh} = 46 \, \text{lakh}
\]
The Deferred Payment Plan (DPP) involves payments spread over 3 years. These future payments will be discounted to their present value using a 10% annual discount rate.
Step 1: The booking payment of INR 10 lakh, made immediately, has a present value of:
\[
PV_{\text{Booking}} = 10 \, \text{lakh}
\]
Step 2: The payment of INR 15 lakh due after 1 year has a present value of:
\[
PV_{\text{Year 1}} = \frac{15 \, \text{lakh}}{(1 + 0.10)^1} = \frac{15}{1.1} = 13.64 \, \text{lakh}
\]
Step 3: The payment of INR 15 lakh due after 2 years has a present value of:
\[
PV_{\text{Year 2}} = \frac{15 \, \text{lakh}}{(1 + 0.10)^2} = \frac{15}{1.21} = 12.40 \, \text{lakh}
\]
Step 4: The payment of INR 10 lakh due after 3 years has a present value of:
\[
PV_{\text{Year 3}} = \frac{10 \, \text{lakh}}{(1 + 0.10)^3} = \frac{10}{1.331} = 7.52 \, \text{lakh}
\]
Step 5: The total present value of the DPP scheme is the sum of all individual present values:
\[
PV_{\text{DPP}} = 10 + 13.64 + 12.40 + 7.52 = 43.56 \, \text{lakh}
\]
Step 6: The customer's savings by choosing the DPP scheme over the FDP scheme are:
\[
\text{Savings} = 46 \, \text{lakh} - 43.56 \, \text{lakh} = 2.44 \, \text{lakh}
\]
Conclusion: Opting for the DPP scheme over the FDP scheme results in a customer saving of INR 2.44 lakh.