First, we have to compute 15% of $138.75, as follows:
[tex]138.75\cdot\frac{15}{100}=20.81[/tex]Next, we have to compute 10% of $138.75, as follows:
[tex]138.75\cdot\frac{10}{100}=13.88[/tex]Then, you will be depositing $138.75 - $20.81 - $13.88 = $104.06 into your checking account every week