Compute the monthly payment for a vehicle that cost $12,300$ if you finance the entire purchase over four years at an annual interest rate of $7\mathrm{.}75\%$ also calculate the loan payments assuming rates of $675\%$ and $875\%$ compare the total amount spent on the vehicle under each assumption the monthly payment for a vehicle that cost $12,300$ if you finance entire purchase over four years at an annual annual interest rate of $7\mathrm{.}75$ is what