Superior Furniture has expanded its operations over the last $5$ years. Their finance director knows they have spent a lot of money over this time and was curious as to how much they have spent on net working capital. She hands you parts of the balance sheets for the company for $2009$ and $2014.$ You note the following assets and liabilities:

Balance Sheet $2009$

Inventory $309$

Accounts Receivable $242$

PP&E $348$

Accounts Payable $221$

Short Term Debt $366$

Balance Sheet $2014$

Inventory $763$

Accounts Receivable $852$

PP&E $700$

Accounts Payable $480$

Short Term Debt $578$

How much has Superior Furniture spent on net working capital in total over the $5$ years?