Answer: $6.40
Step-by-step explanation:
First step is finding how much 80 ft. of rope costs the store. So 0.12*80=9.6, so 80 ft. of rope costs the store $9.60 to buy.
Step 2 is finding out how much the store sells 80 ft. of rope for, so we do .2*80=16. The store sells 80 ft. of rope for $16.
The last step is subtracting. 16-9.6=6.4, so the store makes a profit of $6.40 for every 80 ft. sold.
