Question 1185151
the total cost is 1580.
14 * 25 = 350
18 * 50 = 900
total cost so far is 1250.
remaining amount is 1580 minus 1250 = 330.
remaining number of units is 330 / 22 = 15.


your solution is that the remaining units are 15.


total cost becomes:
14 * 25 = 350
18 * 50 = 900
22 * 15 = 330
total paid is 1580