Multiple Choice
Kristi and Rebecca sell lemonade on the corner for $0.50 per cup.It costs them $0.10 to make each cup.On a certain day,their producer surplus is $20.How many cups did Kristi and Rebecca sell?
A) 40.
B) 200.
C) 8.
D) 50.
Correct Answer:

Verified
Correct Answer:
Verified
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