Answer:
Second option
Step-by-step explanation:
Option 1:
1. Original cost: 90% * 1000 = $900
2. Interest: A = P(1 + rt), A = amount, P = original amount, r = rate, t = years
Plug in: A = 900(1 + 0.05*3)
Multiply + add: A = 900(1.15)
Multiply: A = $1035
Option 2: $1000
So, paying full price upfront will save more money if all goes to plan.