You are purchasing office supplies. because of the volume of your orders your company receives 15% off all purchases. you buy a case of paper for $24.95 and a toner refill at $35.99. you find discontinued ink for $49.95 at 50% off. the local sales tax is 4.5%.

My answer is assuming to work out the total money spent:

24.95 + 35.99 = 60.94
50% of 49.95 = 24.98
Total = 85.92
Discounted gross price= 73.03
Total net pay = $76.31

The way I worked it out involves working out the discount price before the tax pay and also assumes that the ink price is the price before the 50% discount.