Question

A puzzle expert wrote a new sudoku puzzle book. His initial costs are $325.binding and packaging each book costs sixty cents.The Price of the book is one dollar and ninety cents. How many books must be sold to break even enter?an integer

Answer 1

First, we set the equations that model the situation:

Let x be the number of books sold and produced.

$T_1=325+0.60x$

is the cost of producing.

$T_2=1.90x$

is the revenue.

To break even enter, the above equations must satisfy the following condition:

$325+0.60x=1.90x\text{.}$

Solving the equation for x, we get:

$\begin{gathered} 325=1.90x-0.60x=1.30x, \\ x=\frac{325}{1.30}=250. \end{gathered}$

Answer:

$250.$