2. shania bought a $1,455 drum set on the installment plan, the law oy on
down payment and 18 monthly payments of $80.78 each.
a. how much is the down payment?
b. what is the total amount of the monthly payments?
c. how much will shania pay for the drum set on the installment plan?
d. what is the finance charge?

actually what is a question i don't understand

to find the unit price of an object, you divide the price by object. you are trying to find out how much an object cost per unit.

for instance, lets say you have 50lb of ice cream(object) that cost 8.00 dollars(price). to find the unit cost, we take the 8.00 and divide it by 50, which will give us .16 cents per pound. we can check this by multiplying .16 by 50 = 8.00

so

object = e2

price = d2

unit price = c2

formula for c2:

=d2 / e2

so in my example about ice cream, we would have the following.

e2 = 50

d2 = 8.00

c2 formula:

=d2 / e2

this would be 35. 35 + 5 = 40. you take the known constant and subtract by the answer of the equation and you get y.