principal is $750.00 rate is 9 1/2% for 200 days using a 360 day calendar year what's the interest?
Since you didn't specify, based on simple interest,
9 1/2% annual rate = 0.095
0.095/360 days = 0.000264 daily rate
I = PRT
I = 750 * 0.000264 * 200
I = ?