Final answer:
Sarah's total weekly earning is calculated by adding her base salary of $275 to her commission of 3% on $4,800 worth of dinners served. The commission amounts to $144, resulting in a total weekly earning of $419.
Step-by-step explanation:
To calculate the total weekly earning of Sarah, we must consider her base salary and the commission she earns on the dinners she served. First, let's identify her base salary, which is a fixed amount, and then calculate the commission she earns from the total worth of the dinners.
Her base salary is $275 per week. To find the commission, we'll use the given percentage of 3% and apply it to the $4,800 worth of dinners she served.
Commission calculation:
Commission = Percentage of commission × Total worth of dinnersCommission = 0.03 × $4,800Commission = $144
Now, we add the commission to her base salary to find the total weekly earning:
Total weekly earning = Base salary + CommissionTotal weekly earning = $275 + $144Total weekly earning = $419
Therefore, the total weekly earning of Sarah is $419.