The total cost of their dinner is $11.72
The total cost of the dinner can be determined by adding the after tax cost of the Italian salad to the after tax cost of the fettuccini alfredo
After tax cost of the Italian salad = cost before tax + tax paid
cost before tax = $3.99
tax paid = 5% x $3.99
0.05 x $3.99 = $0.20
Total cost = $3.99 + $0.20 = $4.19
After tax cost of the fettuccini alfredo = cost before tax + tax paid
cost before tax = $7.71
tax paid = 5% x $7.71
0.05 x $7.17 = $0.36
Total after tax cost = $7.17 + %0.36 = $7.53
Total cost = $7.53 + $4.19 = $11.72
A similar question was solved here: https://brainly.com/question/13564051?referrer=searchResults
