The monthly interest payment is: B. $12.50.
First step is to find the average monthly interest rate
Average monthly interest rate=1/12× 15%
Average monthly interest rate= 1.25%
Second step is to calculate the monthly interest payments
Monthly interest payments=1.25%× $1,000
Monthly interest payments=$12.50
Inconclusion the monthly interest payment is: B. $12.50.
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