Answer:
15
Step-by-step explanation:
Divide the cost of potatoes by the poundage
80/10=8
Potatoes are $8/per pound
amount of money in hand-cost for 10 pounds
120-80=40
money currently left divided by cost per pound
40/8=5
pounds bought for $40+pounds bought for $80
5+10=15
You can buy 15 pounds of potatoes.