The Mitchem Marble Company has a target current ratio of $2\mathrm{.}1$ but has experienced some difficulties financing its growth in sales over the past $12$ months. At$$ present, the firm has a current ratio of $2\mathrm{.}6$ and current assets of $$$$2\mathrm{.}47$ million. If Mitchem expands its receivables and inventories using its$$ short$-$term line of$$ credit, how much additional$$ short$-$term funding can it borrow before its current ratio standard is$$ reached?