Patterson Brothers recently reported an EBITDA of $$18\mathrm{.}5$ million and net income of $$2\mathrm{.}775$ million. It had $$1\mathrm{.}5$ million of interest expense, and its corporate tax rate was $25\%.$ What was its charge for depreciation and amortization? Write out your answer completely. For example, $25$ million should be entered as $25,000,000.$ Do not round intermediate calculations. Round your answer to the nearest dollar, if necessary.

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