60 grams is the answer I think
Use PEMDAS form. (Parentheses, exponents, multiplication, division, addition, subtraction.) You will first solve -2-8 which is -10, then finish with 9 + (-10), or 9-10, which is -1. The answer is -1.
Part A- DISCOUNT-SALES TAX--- 42.5
WITH TAX-- 45.05
part b- the tip is... 10.5
part c- 11.11