ANSWER:
a. $760
b. $320
c. $1080
STEP-BY-STEP EXPLANATION:
Given:
Regular payment: $20/hr
Sunday payment: $40/hr
Regular work: 38 hours
Sunday work: 8 hours
Therefore:
The regular payment would be:
[tex]p_r=38\cdot20=\text{\$760}[/tex]Overtime pay would be:
[tex]p_o=8\cdot40=\text{\$320}[/tex]The total salary is the sum of both salaries:
[tex]p_t=760+320=\text{ \$1080}[/tex]