Solve
-Mark and Rachel Both Work for Smith Landscaping Company $\$ 35$

Multiple Choice

Solve.
-Mark and Rachel both work for Smith Landscaping Company. Mark can finish a planting job in 3 hours, while it takes Rachel 4 hours to finish the same job. If Mark and Rachel will work together on the job, and the cost of labor is $\$ 35$ per hour, what should the labor estimate be? (Round to the nearest cent, if necessary.)

A) $\$ 60.00$
B) $\$ 20.42$
C) $\$ 122.50$
D) $\$ 120.00$