Question

Dave earns $150 per week plus 3.8% commission.he sold $4175.68 in the month of February. What is his gross monthly earning for february?

Answer 1

If Dave earns $150/week times 4 weeks = 600

3.8% commission on $4175.68 is $158.68

$600 + $158.68 = $758.68 for the month of February

Answer 2

So, Dave earns $150 per week......... In the month of February, there are:
 (28/7) = 4 weeks.
Now, 
He earns a total of $150 * 4 in February . So, in that month he earns $600.

Now, according to the question, he takes a commission of 3.8%. 
So, we have,
Total Sales = $4175.68
Commission amount = Commission % of Total Sales
                                  = 3.8% * $4175.68
                                  = 3.8/100 * $4175.68
                                  = $158.68        (rounded to the nearest hundredth)
Now, 
Gross Income = Monthly income + Commission amount
                         = $600 + $158.68
                         = $758.68
So, his gross monthly earning for the month of february is $758.68