Winston grows green dragon apples. This year, he shipped 80% of these apples to sell at supermarkets and kept the rest to make cider. Of all the green dragon apples he sold to the supermarkets, only 60% of them were bought. If a total of $840 green dragon apples were bought, how many green dragon apples did Winston keep to make cider?

Step-by-step explanation:

Let x be the total number of apples Winston has.

He shipped 4/5 x of the apples to sell.

He only sold 3/5 of the 4/5 x apples he wanted to sell

Therefore, he sold 12/25 or 48% of his total apples for $840 dollars.

Because we don't know the price of each apple, we cannot know how many apples Winston kept.

We can know the theoretical price of his apples though.

if 48% of x = $840

20 % of x = $840/2.4

so he kept $350 worth of apples. or %20 of his total apples