The student union at Cavendish University Zambia is selling union branded

T-shirts to students at 50 Zambian Kwacha (K50.00) per T-shirt. They

must have a guarantee of selling 150 T-shirts. Furthermore, they agree that

for each T-shirt in excess of 150, they will reduce the price per T-shirt by

K0.04. How many T-shirts will it take to maximise the revenue?​