Please help, thank you

Wendy Epstein, a sales representative, earns an annual salary of $27,400 and receives a commission on that portion of her annual sales that exceeds $150,000. The commission is 7.0% on all sales up to $50,000 above the quota. Beyond that amount, she receives a commission of 8.5%. Her total sales for the past year were $245,000. Compute the following amounts: a. The regular annual salary $ b. The commission $ C. The total annual earnings $