What is the total cost to repay a $20000 balance on a credit card loan with an APR of 18% and a minimum monthly payment of $310?

APR is 18%. We need to take the monthly interest which is equal to

= 18% / 12

= 1.5% (monthly interest)

Monthly, you have to pay

= (310 * 0.015) + 310

= $314.65

You need to repay the balance of $20,000.

Then multiplied it with APR of 18%

= (20, 000 * 0.18) + 20,000

= $23600.00