Current Attempt in Progress Determine the interest on the following notes: (Round answers to 2 decimal places, e.g. 52.75. Use 360 days for calculation.) (a) $1,720 at 6% for 90 days. $ LA (b) $840 at 9% for 5 months. $ (c) $2,580 at 8% for 60 days. (d) $1,350 at 7% for 6 months. LA LA