1 Q2 Q3 Q4 Minimum Cash Balance 800 800 800 800 Accounts Receivable 1400 800 700 3700 Inventory 1100 3100 Accounts Payable (600) (600) 5200 (600) 550 (600) The data above shows the net working capital requirements for Blunderstone Shoes, a company that makes waterproof boots. All figures are in thousands of dollars. What can be considered the firm's permanent working capital