Final answer:
To calculate Shayna's commission on the 3 sales, we need to find the total sales amount first. Since she sold 3 vehicles at $37,000 each, the total sales amount is $111,000. Shayna's commission is 18% of the difference between the total sales amount and $83,000.
Step-by-step explanation:
To calculate Shayna's commission on the 3 sales, we need to find the total sales amount first. Since she sold 3 vehicles at $37,000 each, the total sales amount is 3 * $37,000 = $111,000.
Now we can calculate her commission. Shayna makes a commission of 18% of her total sales over $83,000. Since $111,000 is greater than $83,000, we can calculate the commission as 18% of the difference between $111,000 and $83,000. The difference is $111,000 - $83,000 = $28,000.
So her commission is 18% * $28,000 = $5,040.
Therefore, Shayna made a commission of $5,040 on the 3 sales.