A master production schedule shows the following information. Using a lot$-$for$-$lot rule, what is the MPS quantity for week $4?$

MPS

Week$1$

Week $2$

Week $3$

Week $4$

Forecast

$500$

$550$

$400$

$500$

Actual Customer Orders

$550$

$600$

$500$

$450$

Question $15$ options:

$600$

$50$

$500$

$450$

$400$