Respuesta :
The answer should be $91.
7% of $15,600 is $1092. (Divide 15600 by 100, then multiply the result by 7). Divide 1092 by 360, and you get a result of 3.03 for your "daily interest" accrual, as spread out over a 360 day year.
Then multiply that amount (3.03) by the 30 days between the 1st and the 31st, and you get 91.