Evaluate the piecewise function at the given values of the independent variable.

Ms.ortiz sells tomatoes wholesale. the function p(x)=-80x^2+320x-10, graphed below, indicates how much profit she makes on a load of tomatoes if she makes on a load of tomatoes if she sells them for 4-x dollars per kilogram. what should ms.ortiz charge per kilogram of tomatoes to make on a load of tomatoes?

The answer is 7.2 how would you put this as money

Iknow the answer but the calculator doesn't seem to give the right one