Erica treated her sister to lunch while visiting her in Lowell. Their lunch cost $60, and the sales tax in Lowell is 5%. If Erica left a 20% tip on the $60, how much in total did she pay?

Erica payed a total of $75

Step-by-step explanation:

Step 1: Determine total lunch cost

Total lunch cost=$60

Step 2: Calculate total sales tax

Total sales tax=tax rate*total lunch cost

where;

tax rate=5%

total lunch cost=$60

replacing;

Total sales tax = (5/100) * 60=$3

Total sales tax=$3

Step 3: Cost of tip

Cost of tip=20% of 60 = (20/100) * 60=$12

Step 4: Total she payed

Total she payed=Cost of tip+total sales tax+total lunch cost

where;

Cost of tip=$12

total sales tax=$3

total lunch cost=$60

replacing;

Total she payed = (12+3+60) = $75

Erica payed a total of $75