A hardware store is offering 20 light bulbs at a total cost of $71.02, which includes a 6% sales tax.
Before taxes, how much did a single light bulb cost?

Cost of a single light bulb is $3.34

Step-by-step explanation:

Value of sales tax = 6% ×$71.02

= $4.2612

Total cost of bulb before tax = Total cost of bulb - Value of sales tax

= $71.02 - $4.2612

= $66.7588

Value of a single light bulb = Total cost of bulb before tax ÷ Total number of light bulbs

= $66.7588 ÷ $20

= $3.33794

= $3.34 Approximately.

step-by-step explanation: