Let's use the variable x to represent the sales in a week.
In the first company, the total payment is 3% of x, that is, 0.03x
In the second company, the total payment is $260 plus 2% of x, that is, 260 + 0.02x.
The value of x that makes both options be equally good (same payment) is:
![\begin{gathered} 0.03x=260+0.02x \\ 0.03x-0.02x=260 \\ 0.01x=260 \\ x=26000 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/c70yr6nttt6eemps2qgua64fq7hdqsqoiw.png)
Therefore the sales should be $26,000.