Tanya opens a lemonade stand and produces one pitcher of lemonade made from $2 worth of lemons and $1 worth of sugar. Each pitcher yields 20 cups. Twenty plastic cups cost Tanya $1. Assuming no cost for her own labor and no cost for pitcher, spoon and table lent by her mother, what is her average total cost of production?
Select one:
a. 1 dollar
b. 50 cents
c. 20 cents
d. 4 dollars