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10) Rob and Kristin are selling cookie dough for a school fundraiser. Customers can buy packages of
sugar cookie dough and packages of oatmeal cookie dough. Rob sold 6 packages of sugar cookie
dough and 9 packages of oatmeal cookie dough for a total of $237. Kristin sold 12 packages of
sugar cookie dough and 5 packages of oatmeal cookie dough for a total of $253. Find the cost
each of one package of sugar cookie dough and one package of oatmeal cookie dough.