let's say is "x", therefore "x" is the 100%, and we know that 0.35 is the 4%.

This is the diagram to the question above.
Based on the given problem above, here is the given solution.
Given that small bags = $5
large bags = $8
6 bags = $45
? = number of each size bag you bought
The answer based on the given values above is 5 LARGE BAGS and 1 SMALL BAG.
Since per large bag is $8. $8 x 5 = $40
And per small bag is $5 x 1 = $5
So this gives you a total of $45
hope this helps!