Answer:
Richard's income for month is $4,430.
Explanation:
We are given the following in the question:
Retainer received by Richard = $1630
Percentage of commission earned on monthly sales = 7%
Monthly sales = $40,000
Commission earned =
![=7\%* 40000\\\\=(7)/(100)* 40000\\\\=2800\$](https://img.qammunity.org/2021/formulas/mathematics/high-school/67ttodgkjqegmlckzcjl752aw6zab0359i.png)
Income for month =
= Retainer received + Commission value
![=1630 + 2800\\=\$4430](https://img.qammunity.org/2021/formulas/mathematics/high-school/v9dovqdbd74iygakgcc2e6tbun8c16tz1m.png)
Thus, Richard's income for month is $4,430.