The sales clerks of Teresa's Treasures are paid a salary of $225 per

week plus a commision of 8% on all sales they make. Find the amount of
commission earned by Jan Yarrow with $3,480.75 sales for the week.

To find the amount of commission earned by Jan Yarrow, we can calculate 8% of her sales.

Commission = 8% * Sales
Commission = 0.08 * $3480.75

Commission = $278.46

Therefore, Jan Yarrow earned a commission of $278.46.