Answer
(a) $\$6000$
(b) $\$8000$
Work Step by Step
The given formula for the production cost $C$ is:
$C=4000+2(x)$.
To find the production cost of producing $1000$ watches, substitute $1000$ to $x$ in the formula above:
(a)
$C=4000+2(1000)$.
$C=4000+2000$.
$C=6000$.
Hence, the cost of producing $1000$ watches is $\$6000$.
To find the production cost of producing $2000$ watches, substitute $2000$ to $x$ in the formula above:
(b)
$C=4000+2(2000)$.
$C=4000+4000$.
$C=8000$.
Hence, the cost of producing $2000$ watches is $\$8000$.
