Orange City needs to purchase a fleet of new police vehicles. The city will purchase 10 vehicles, each costing $35,000 and they will borrow the entire purchase price with a 5 year loan and make monthly payments. The city council has budgeted $7,000 per month to pay off the vehicle loan. What is the maximum annual interest rate the city can afford to pay on the loan?
An Annuity is a series of payments of fixed amounts and at fixed intervals.
These can be of two types:
· Ordinary Annuity – payment is made at the end of each period.
· Annuity Due – Payment is made at the beginning of each period
PV of an ordinary annuity can be calculated as:
Where C denotes the fixed annuity amount or $ 7,000
r denotes the rate of interest,
n denotes the number of periods or 60
The total Purchase price is the PV = $ 35,000 * 10 = $ 350,000
Substituting the above values, calculate r:
The monthly interest rate is 0.618%
Thus, the annual interest rate that can be afforded is 0.618% * 12 = 7.42%
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