Alexander Smith receives a salary of $250 per week plus a commission of 15% on all sales over $1500. Find his earnings during a week in which sales totaled $3000.

Not sure how to set this up.

250 + (0.15 * 1,500) = e

To calculate Alexander Smith's earnings during a week, where sales totaled $3000, we need to consider both his base salary and his commission.

First, let's calculate the commission amount. The commission is 15% on all sales over $1500. So, we subtract $1500 from the total sales of $3000 to get the amount that qualifies for commission: $3000 - $1500 = $1500.

Next, we calculate the commission on this amount. The commission rate is 15% of $1500, which can be found by multiplying $1500 by 0.15: $1500 * 0.15 = $225.

Now, let's add Alexander's base salary of $250 to the commission amount of $225: $250 + $225 = $475.

Therefore, Alexander Smith's earnings during a week when sales totaled $3000 would be $475.