Mathematics, 01.03.2021 14:40, yadirahurtado4444

A door-to-door salesman sells 10 security systems in one week at $1200 each. For the week, he earns a total of $850, including a retainer of $300 and a
commission. Find his percentage commission correct to two decimal places.

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A door-to-door salesman sells 10 security systems in one week at $1200 each. For the week, he earns...