
Answer:
$5,200,000
Explanation:
Operating income before tax = Sales revenue - operating costs - Depreciation
                        = $20,000,000 - $14,000,000 - $4,000,000
                        = $2,000,000
Operating income after taxes = Operating income before tax  - Taxes@40%
                         = $2,000,000 - $800,000
                         = $1,200,000
Operating cash flow = Operating income after taxes + Depreciation
                 = $1,200,000 + $4,000,000
                 = $5,200,000