Last weekend, Emma sold lemonade at a yard sale. The equation \( P = 0.50 c - 9.96 \)represented the profit, P. Emma earned selling c cups of lemonade. What does the number \( 0.50 \) represent in this situation?
The number of cups of lemonade
The cost of each cup
The cost to set up at the yard sale
The number of people at the yard sale