Answer: Ronland made 15 sales for the week.
Explanation:
To find out how many sales Roland made this week, let's break down the information given:
1. Roland and Donna earned the same amount this week.
2. Donna made 2 more sales than Roland.
3. Roland earns a base of $64 plus $10 per sale.
4. Donna earns a base of $78 plus $8 per sale.
First, let's calculate Donna's earnings. Since she made 2 more sales than Roland, we can assume that her total sales are x + 2, where x is Roland's total sales.
Donna's earnings = base + (number of sales * earnings per sale)
Donna's earnings = $78 + (x + 2) * $8
Next, let's calculate Roland's earnings using the given information.
Roland's earnings = base + (number of sales * earnings per sale)
Roland's earnings = $64 + x * $10
Since Roland and Donna earned the same amount, we can set their earnings equations equal to each other:
$78 + (x + 2) * $8 = $64 + x * $10
Now, we can solve this equation to find the value of x, which represents Roland's total sales:
$78 + $8x + $16 = $64 + $10x
Combine like terms:
$8x - $10x = $64 - $78 - $16
Simplify:
-$2x = -$30
Divide by -2:
x = 15
Therefore, Roland made 15 sales this week.