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CONSOLIDATED STATEMENTS OF INCOME (Parenthetical) - USD ($) | Dec. 31, 2020 | Dec. 31, 2019
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CONSOLIDATED STATEMENTS OF INCOME |  |
Total cost of revenue (including purchases from related parties of $1,349,331 in 2020 and $10,295 in 2019) | $ 1,349,331 | $ 10,295

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