Sam Quaker receives a salary of $300 per week plus a 5 and 1/2% commission on his sales. Last week he sold $3,880 worth of merchandise. How much did Mr. Quaker make last week?

300 + .055*3880 = 513.40

394.90 To find out how much Mr. Quaker made last week, we need to calculate his salary and commission separately, and then add them together.

First, let's calculate his commission. Mr. Quaker's commission is 5 and 1/2% of his total sales. So, we can calculate his commission amount as follows:

Commission = (5.5/100) * Total Sales
= (5.5/100) * $3,880

Next, let's calculate his salary. His weekly salary is a fixed amount of $300 per week.

Now, we can find the total amount Mr. Quaker made last week by adding his salary and commission.

Total Earnings = Salary + Commission

Substituting the values we calculated earlier:

Total Earnings = $300 + Commission

Finally, we can substitute the value of the commission we calculated to find the total earnings.

Total Earnings = $300 + (5.5/100) * $3,880

Calculating this expression will give us the final answer.