Answer and Explanation:
Let us assume the following things
x = dogwood inventory percentage
and, (50,000 - x) = red maple tree inventory percentage
And, the amount of profit is
= $50,000 × 0.20
= $10,000
Now the equation would be
0.28x + 0.18 × ($50,000 - x) = $10,000
0.28x + $9,000 - 0.18x = $10,000
0.10x = 1,000
x = 10,000 = dogwood
So, the red maple would be
= 50,000 - 10,000
= 40,000