Question

janice published a novel. Last month the book sold 1364 copies, earning Janice a total of $1579.16. This month the book sold 1347 copies. How much should Janice expect to receive in royalties this month?

Answer 1

$\ 1562.52$

Unitary Method

The unitary method is a methodology for solving problems that involves first determining the value of a single unit and then multiplying that value by the required value. The unitary method is used to calculate the value of a single unit from a given multiple.

Number of books sold last month $=1364$

Total amount earned $=\ 1579.16$

So,

Price of each book $=\frac{1579.16}{1364}$

                                $=\ 1.16$

Number of books sold this month $=1347$

Total amount earned $=1.16\times 1347$

                                   $=\boldsymbol{\ 1562.52}$

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