Amy's lemonade business is doing well. Her profit equation is represented by P(x)=0.25x-50, where x represents the number of cups sold. Explain the meaning of the following:
A. 0.25 in her equation
B. 50 in her equation
C. How many cups of lemonade must she sell to make a break even?
D. How many cups of lemonade must she sell to make a profit of $75.00?