b. After 36 days, Kevin sold the promissory note to his friend when the simple interest rate for it increased to 5.75% p.a. What was his selling price? $991.41 $240.24 $945.63 O $791.43 b. After 36 days, Kevin sold the promissory note to his friend when the simple interest rate for it increased to 5.75% p.a. What was his selling price? $991.41 $240.24 $945.63 O $791.43