Dak, a purchasing manager for a farm co$-$op$,$ negotiated a deal for some equipment. The farm co$-$op took

out a loan of $$18,000\mathrm{.}00,$ with a $$4,000\mathrm{.}00$ payment due at signing $($assume all of this payment applies

towards the loan amount$).$ The remaining will be paid off with quarterly payments for the next $3$ years. If

the negotiated interest rate on the debt is $7\mathrm{.}6\%$ compounded quarterly. What will the farm co$-$op's payment

be$?$ If needed, round to $2$ decimal places.

a$)$ The quarterly payment would be $$

Assuming all of the payments were on time and the farm co$-$op did not prepay on the loan.

What is the total amount the farm co$-$op paid and the total interest?

b$)$ The total amount the farm co$-$op paid was $

and the total interest was

$---$ Need help finding the first part of question b$.$ It isnt $15788\mathrm{.}64$ as i got.