Answer:
1. A (85)(0.08)=6.90 then (85)(0.18)=15.30 then 85 + 6.90 + 15.30 =107.10
2. 82.68
Solving;
She was charged $65 before tax. She had to pay a 6% tax (65)(0.06)=3.90 then 65+3.90=68.90
After this she added 20% of the amount after tax rather 20% of 68.90
68.90(0.20)=13.78 then 68.90+13.78=82.68