a Calculate the total cost of 5 cases yearbooks after the discounts of each company.
B
b Use the calculations we did in Part A.
A
a Yearbooks R Us
B
b $ 668.78
Practice makes perfect
a We need to choose a company to order 5 cases of yearbooks.
The options are Neighborhood Yearbooks and Yearbooks R US. Let's make a table to show the costs of a case of yearbooks and their discount amounts for 5 cases.
Cost of a Case Yearbooks
Discount for 5 Cases Yearbooks
Neighborhood Yearbooks
$ 153.85
10 %= 0.10
Yearbooks R US
$ 157.36
15 %= 0.15
We should evaluate the cost of choosing 5 cases of yearbooks after the discount from each company.
Cost of 5 Cases Yearbooks
Result
Neighborhood Yearbooks
5( 153.85)- 0.10( 5)( 153.85)
$ 692.325≈ $692.33
Yearbooks R US
5( 157.36)- 0.15( 5)( 157.36)
$ 668.78
The total cost of 5 cases yearbooks from Yearbooks R US is lower then Neighborhood Yearbooks.
$ 668.78<$692.33
Therefore, we will choose Yearbooks R Us.
b In Part A we chose the company Yearbooks R US to buy 5 cases of yearbooks, because the total cost is lower than Neighborhood Yearbooks.
Therefore, to find the least amount that we would spend for yearbooks we need to find the total cost of choosing Yearbooks R US. We found the cost in Part A.
Cost of 5 Cases Yearbooks
Result
Yearbooks R US
5(157.36)-0.15(5)(157.36)
$ 668.78
The least amount that we would spend for yearbooks is $ 668.78.
