Use the income statement shown next to calculate free cash flow for Rainier Printing for 2021. In addition to the information in the income statement, assume that Rainier had $680,000 in capital expenditures and $480,000 in working capital investments during 2021. Rainier Printing Income Statement January 1 to December 31, 2021 ($ thousands) Net sales $ 10,600 Cost of sales 6,800 Gross profit 3,800 Operating expense 1,180 Depreciation expense 630 Operating income 1,990 Interest expense 330 Income before tax 1,660 Tax 664 Income after tax $ 996