I have a few problems I need help with. Which formulas would be used to figure out these numbers?

A. If cash is borrowed on a $61,200,11-month,10% note on August 1,

how much interest expense would be incurred by December 31?

I do not know which formula to use here?

B.

The cash register total including sales taxes is $43,470, and the sales tax

rate is5%. What is the sales taxes payable? Please show how to get the correct number.

C. If $43,470is collected in advance on November 1 for6-month magazine

subscriptions, what amount of subscription revenue should be recognized

on December 31?