Answer:
you could buy a pair of shoes and a belt still have 95 dollars to spend
20.99%/12 = 1.7492% which is the monthly rate (or at least the way my credit card does it)
1.7492/100 * 3825 = 66.91
66.91 is just a rounding error. <<<=== answer.
I cannot see the mass of the moon, can you comment the two masses so I can explain?