Answer:
$1,840
Step-by-step explanation:
In order to calculate the Marginal cost of producing the computers in 2nd hour of work, we need to add the marginal cost of computer and marginal cost of wage in the 2nd hour of work.
MC = MC(computers) + MC(wage)
MC = $1,800(w) + $40
MC = $1,840
Working
MC (computers ) = 3 x 600$ = $1,800
hour computers assembled
1st 4
2nd 7
If pam works 2 hours she can assemble 7 computers but she already assembled 4 computers in 1st hour.
So the 2nd-hour computers will be 3 ( 7 - 4) computers.