which of the purchases would be the least expensive?\n|purchase|amount of sale|sales tax rate|\n|----|----|…

which of the purchases would be the least expensive?\n|purchase|amount of sale|sales tax rate|\n|----|----|----|\n|a|$150|5%|\n|b|$145|7%|\n|c|$140|8%|\n|d|$135|9%|\npurchase a\npurchase b\npurchase c\npurchase d

which of the purchases would be the least expensive?\n|purchase|amount of sale|sales tax rate|\n|----|----|----|\n|a|$150|5%|\n|b|$145|7%|\n|c|$140|8%|\n|d|$135|9%|\npurchase a\npurchase b\npurchase c\npurchase d

Answer

Explanation:

Step1: Calculate total cost for A

The sales - tax for A is $150\times0.05 = 7.5$. The total cost of A is $150 + 7.5=157.5$.

Step2: Calculate total cost for B

The sales - tax for B is $145\times0.07 = 10.15$. The total cost of B is $145 + 10.15 = 155.15$.

Step3: Calculate total cost for C

The sales - tax for C is $140\times0.08 = 11.2$. The total cost of C is $140+11.2 = 151.2$.

Step4: Calculate total cost for D

The sales - tax for D is $135\times0.09 = 12.15$. The total cost of D is $135 + 12.15=147.15$.

Answer:

D. purchase D