Grady Precision Measurement Tools has forecasted the following sales and costs for a new GPS system: annual sales of $50,000$ units at $$20$ a unit, production costs at $40\%$ of sales price, annual fixed costs for production at $$120,000,$ and straight$-$line depreciation expense of $$240,000$ per year. The company tax rate is $30\%.$ What is the annual operating cash flow of the new GPS system?