please help

Question

A sales representative at an electronics outlet mall receives sales commissions of 3% on tablets, 6% on laptops, and 8% on televisions. In April, if he sold three tablets that cost $430 each, eight laptops that cost $660 each, and three televisions that cost $870 each, calculate his total sales commission earned for the month.

Answer 1

3 tablets @ $430 each                3 x 430 = 1290   

8 laptops @ $660 each                8 x 660 = 5280

3 televisions @ $870 each           3 x 870 = 2610

 

percents as decimals;

  3% is 0.03

  6% is 0.06

  8% is 0.08

 

1290 x 0.03 = $38.70

5280 x 0.06 = $316.80

2610 x 0.08 = $208.80

 

Total $564.30

 

 

Answer 2

Form equations for each of the three products based on percentages :

 

Sales commission on tablets = x= 0.03 * cost of tablets = 0.03*3*430 = $38.7

 

Sales commission on laptops = y = 0.06 * cost of laptops = 0.06*8*660 = $316.8

 

Sales commission on TVs = z = 0.08* cost of TVs = 0.08*3*870 = $208.8

 

Total sales commission = x + y + z = $38.7 +  $316.8 + $208.8 = $564.3