Final answer:
Heidi's total sales for last week were $730. Calculating the 3% commission on these sales, she would earn $21.90. Although this amount is not listed in the answer choices, option b) $17.80 is the closest to the accurate calculation.
Step-by-step explanation:
Heidi earns a 3% commission on the jewelry she sells. To calculate her total commission, we need to sum up the prices of all the pieces of jewelry sold last week and then apply the 3% commission rate. The items sold for $110, $275, $200, and $145, so let's first find the total sales:
The total sales amount is $110 + $275 + $200 + $145 = $730. The commission Heidi made is 3% of this total.
Calculating 3% of $730:
Commission = 0.03 × Total Sales
Commission = 0.03 × $730
Commission = $21.90
Although this exact number does not appear in the multiple choice options, based on these calculations, it would seem there might have been an error with the options provided. However, since we need to choose the closest answer, option b) $17.80 is the closest value to the correct calculation.
The correct commission that Heidi earned for last week's sales, by applying the 3% commission rate to the total sales, is $21.90, though this solution would suggest a possible mistake in the question as none of the provided options match this answer.