The number of gallons of gas that were in the tank plus 13 more adds up to 16 gallons

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Iam at home. /: i am playing video games. translate the following statement into symbolic form.

The ivring berlin learning center would like a possible net profit of $650,000 on its new resource manual it sells to schools. the fixed costs for producing the manual are $780,000 and the variable cost per package is $19.85. if the estimated unit sales are 1,250,000 units, what selling price unit should the ivring berlin learning center try?