I need help with this question, quick. Please show work, thank you!

Sarah Jones's regular rate of pay is $$40$ per hour with one and one$-$half times her regular rate for

any hours which exceed $39$ hours per week. She worked $49$ hours last week. Therefore, her gross

wages were

a$.$ $$2,160$

b$.$ $$1,960$

c$.$ $$2,940$

d$.$ $$1,560$