Answer:
You are correct. $6,300/month is the monthly income based on monthly interest of $315 and a 5% value.
Explanation:
See attached worksheet.
(($315/month)/0.05)) = $6,300/month
This assumes that the $315 is for one month, although the time period is not stated. It also assumes that the desired answer is also in $/month. If the question is asking for a year's income, then $6,300 needs to be multiplied by 12 ($75,600/year).
The computer [programmer] is either not explicit or not correct.