Final answer:
To find Betty's total sales this week, subtract her salary from her total earnings. Her total sales this week were $1500.
Step-by-step explanation:
To find Betty's total sales this week, we need to subtract her salary from her total earnings. We can set up an equation to represent this:
Total earnings = Salary + Commission
Given that Betty's salary is $200 and her total earnings are $275, we have:
$275 = $200 + Commission
To find the commission, we can subtract $200 from both sides of the equation:
Commission = $275 - $200 = $75
We are also told that Betty's commission is 5% of her total sales. So, we can set up another equation:
Commission = 0.05 * Total sales
Now we can solve for the total sales:
Total sales = Commission / 0.05 = $75 / 0.05 = $1500
Therefore, Betty's total sales this week were $1500.