Answer:
71.90
Step-by-step explanation:
The selling price includes the cost (100% of the cost) plus 5% of the cost. This means it is 100+5 = 105% of the cost.
105% = 105/100 = 1.05; this means we can use the equation
1.05x = 75.5
Divide both sides by 1.05:
1.05x/1.05 = 75.5/1.05
x = 71.90