Food bill: $45
Tip: 18%
Sales tax (on food only): 5.5%

$55.58

Step-by-step explanation:

First off turn your percent to decimals then times it by 45 like this

45 x 0.18 = 8.10

45 x 0.055 = 2.475 - 2.48 (round this one up)

Now add them all together

45 + 8.10 + 2.48 = 55. 58

ANSWER: $55.58