Ace's Business Forms has compiled several factors relative to its financing mix. The firm pays $8$ percent on short$-$term funds and $10$ percent on long$-$term funds, while receives $7$ percent on marketable securities$.$ The firm's monthly net working capital requirements for the previous year are summarized in the following table.

$\backslash$table$[[$Month$,$Net Working Capital$],[$January$,125,000\mathrm{.}00$