SOLUTION: the cost of telephone service is calculated on three part rates, #14.00 per unit for the first 25 units, #18.00 per unit for the next 50 units, #22.00 per unit for the remainder. i
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Question 1185151: the cost of telephone service is calculated on three part rates, #14.00 per unit for the first 25 units, #18.00 per unit for the next 50 units, #22.00 per unit for the remainder. if the total amount paid is #1,580.00, find the remaining units
Answer by Theo(13342) (Show Source): You can put this solution on YOUR website!
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
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