5) Arianna sells appliances at P.C. Richards. She gets paid \( \$ 18.50 \) per hour and earns \( 2.5 \% \) commission on her total sales. Last week, she worked for 12 hours an her sales totaled to \( \$ 6,396 \). How much did Arianna earn in total last week?

To calculate Arianna's total earnings, we first find her hourly wages for the 12 hours she worked. This is done by multiplying her hourly rate by the number of hours worked: \[ \text{Hourly Earnings} = 18.50 \times 12 = 222 \] Next, we calculate her commission based on her total sales. To find the commission, we multiply her total sales by the commission rate: \[ \text{Commission} = 6396 \times 0.025 = 159.90 \] Now, we add her hourly earnings and her commission to get her total earnings for the week: \[ \text{Total Earnings} = 222 + 159.90 = 381.90 \] So, Arianna earned a total of \( \$ 381.90 \) last week.