Solution:
Given:
[tex]\begin{gathered} monthly\text{ salary}=\text{ \$}590 \\ commission\text{ rate}=4\text{ \%} \\ Sales\text{ made}=\text{ \$}27,800 \end{gathered}[/tex]
1) Amount of commission is 4% of merchandise sales made.
Hence,
[tex]\frac{4}{100}\times27800=\text{ \$}1112[/tex]
Therefore, the amount of commission is $1112.
2) Gross pay is the total amount recevied.
Hence,
[tex]\begin{gathered} Gross\text{ pay}=590+1112 \\ =\text{ \$}1702 \end{gathered}[/tex]
Therefore, the gross pay Donald recieved is $1702.