A sales representative for a Children's Fashion store earns a salary of $1100.00 per month plus a commission based on the total sales. During the month of January, this sales representative's total sales were $8300.00 and was paid $2130.00. What is this sales representative's commission rate?

a.
14.30963855%

b.
11.10963855%

c.
13.60963855%

d.
12.40963855%

e.
14.60963855%

f.
None of the above.