Answer
36 pies
Step-by-step explanation:
to find out how much one pie costs we divide the profit made by the number of pies sold, or p/n = cost of 1 pie
from this we can conclude that 1 pie = $4
to find how many pies were sold we just plug back into the equation
so: $144/n = $4 and from this we get 36 pies
