Mary bought some Rubik cubes for $800. She sold 1/2 at a profit of 20% and 1/5 at a loss of 15%. How much must she sell the remaining to make a total profit of 30%?
-
Say she bought 10 cubes.
5 sold for $960 = $4800
2 sold for $680 = $1360
Total: $6160
Needs to make $10400 overall, so must make $4240 from the sale of the other three, so the selling price is $1413.33
5 sold for $960 = $4800
2 sold for $680 = $1360
Total: $6160
Needs to make $10400 overall, so must make $4240 from the sale of the other three, so the selling price is $1413.33