100% - 30% = 70%
The shirt is selling for 70% of the original price.
Multiply the original price by 70%
26.98 x 0.70 = 18.89
The sale price is $18.89
60,000 would be the answer because it stays the same if under 5 it stays if above 5 rounds up once

k and m must satisfy 8k = 1 mean k = ⅛
and 2km+⅝=0 mean m = -5/2
3/15 means if you pay the bill within 15 you will get a discount by 3%
Now solve your question
178.95−(178.95×0.03)
=173.58 be paid