Question

Gloria talked on her cell phone for 320 minutes the first
month, 243 minutes the second month, and 489 minutes the third month. Her payment package does not allow her to pay per minute; she can only buy groups of
minutes. If she has to pay $25 for every 200 minutes, how much did she pay
for the first 3 months?
total $175.50+50+75

Answer 1

That depends - do the minutes roll over, or not?

If not, then she had to buy
400 the 1st month
400 the 2nd month
600 the 3rd month

That's $50+$50+$75 = $175

If they roll over at the end of the month, then she'd have to buy less in some cases.