Raiders Restaurant is considering the purchase of a $$10,000,000$ flat$-$top grill. The grill has an economic life of $6$ years and will be fully depreciated using the straight$-$line method. The grill is expected to produce $600,000$ tacos per year for the next $6$ years, each taco costing $$4$ to make and priced at $$11.$ Assume the discount rate is $12\%$ and the tax rate is $21\%.$ The restaurant expects the market value of the grill to be $$0,6$ years from now.

Calculate the book value of the grill at the end of year $3.($Round to $2$ decimals$)$ Calculate the operating cash flow at the end of year $4.$