A shop sells coffee and donuts. The coffee sells for $4.31 and donuts for $0.83 apiece. The cost to produce a cup of coffee is $1.50 and the cost to make a donut is $0.76. In month 1 the quantity of coffee sold is 1,283 and donuts sold was 216. In month 2 the quantity of coffee sold is 4,210 and donuts sold was 317.

Question

a) Calculate the profit for month 1 and 2 for both coffee and donuts.

My answer for Month 1 is coffee profit is $3,605.23 and donut profit is $15.12. Month 2 coffee profit is $11,830.10 and donut profit is $23.59. Is this correct?

b) In month 3 the coffee profit is $8,763 and the donut profit is $99.99. What is the quantity of donuts and coffee sold?

My answer is 3,118 cups of coffee sold and 1,428 donuts sold. Is this correct?

Answer 1

a. Month 1:
Profit = (4.31-1.50)/cup * 1283cups =
$3605.23

Profit = (0.83-0.76)/donut * 216Donuts =
$15.12

Month 2:
Profit = (4.31-1.50)/cup * 4210cups =
$11,830.10

Profit = (0.83-0.76)/donut * 317Donuts =
$22.19

Answer 2

write the expression for the perimeter of the pond