can you solve the below problem, the answer $31300,$ not sure how it is possilble?

Question $3$

The following table provides your current required production schedule per

week:

Assuming your holding costs are $$2$ per unit per week and set$-$up costs are $7,500$

per run, what are the total costs if you utilize the least total cost method?

Recall that Least total cost method tries to find the set of production that

makes the total holding costs for that production run equal to the set$-$up

costs. Plan out each week's production plan $($e$.$g$.,$ week $1,$ week $1-2,$ week

$1-3)$ and calculate the total holding costs for each possible production

size. Pick the production plan that gives a holding cost closest to the set$-$

up costs. Repeat for the remaining weeks until there are no more weeks!