We must first know how much 1/4 kilo sugar did the store keeper repacked.
Now, multiply it to 20 pesos.
So, he sold the 7 kilos of sugar in 560 pesos.
Lastly, let's find out how much did the store keeper earned.
Therefore, the store keeper earned 140 pesos from the 7 kg sugar hr sold.
So the store keep bought 7 kg worth 420pesos
and contains 1/4 kg and each pack 20 pesos.
So first we need to used division.7 kg ÷ 1/4 = 28
Or use different methods use multiply
use reciprocal the 1/4 to 4/17 × 4/1 = 28
At this methods you can have the same results.
Now the remaining is (20, 420) numbers you need to multiply 20 to 2820 × 28 = 560
Then Subtract the result to 420.560 - 420 = 140
So, the store keep earned 140.
3.50 per comic book