Answer
a. $
\$ 6000
.$
b. $
\$ 8000
.$
Work Step by Step
The cost is given by the function:
$C=4000+2x$
where $x$ is the number of watches and $C$ is the cost in dollars.
Then we have:
a. The cost of producing 1000 watches is
$
C=4000+2(1000)=\$ 6000
.$
b. The cost of producing 2000 watches is
$
C=4000+2(2000)=\$ 8000
.$
