Final answer:
The profit from chickens will equal the profit from ducks after the same number of months, but both options currently result in a loss. Therefore, the urban farmer will not make a profit from either option.
Step-by-step explanation:
To determine when the profit from chickens will equal the profit from ducks, we need to calculate the costs and revenues for both options. Let's start with the chickens:
Total cost for materials for the henhouse and chicken run: $560
Cost to purchase four female chicks: $20
Cost of feed for one month: $14
Total revenue from selling eggs: $5 per dozen x 7 dozen = $35
Profit from chickens: Revenue - Costs = $35 - ($560 + $20 + $14) = -$559
Now let's calculate the costs and revenues for the ducks:
Total cost for materials for the duck setup: $620
Cost to purchase four female ducklings: $20
Cost of feed for one month: $14
Total revenue from selling eggs: $6 per dozen x 9 dozen = $54
Profit from ducks: Revenue - Costs = $54 - ($620 + $20 + $14) = -$600
As we can see, both options currently result in a loss. To find out how many months it will take for the profit from chickens to equal the profit from ducks, we can set up an equation: Profit from chickens x months = Profit from ducks x months. Since the profits are negative, the equation becomes: (-559) x months = (-600) x months. This means that the profit from chickens will equal the profit from ducks after the same number of months.
Therefore, it will never happen because the profits are both negative. The urban farmer will not make a profit from either option.