Using this table, calculate the marginal cost of each of these quantities of bikes.
The fourth bike: $[___]
20
The sixth bike: $[___]
50
The seventh bike: $[___]
60
Using this table, calculate the marginal cost of each of these quantities of bikes.

This graph shows the marginal cost of producing each bike. Select the correct answer from the options available.Based on this graph, which bike has a marginal cost of $20?
One bike: -$[___]

30
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