Estimate, using the straight$-$line method, the hourly depreciation of a $245hp$ hydraulic excavator that has an actual delivered cost of $$172,600,$ salvage value of $$17,200$ after a useful life of $8$ years, and expected to be used for $1,600$ hours per year.

The crew in problem $1$ is using a $90$ Ton lattice boom crane and a $300$ amp gas engine welder to complete their work. Calculate the total equipment cost of this roof framing$]$activity $($including the operator costs$),$ assuming the following:

The crane can be rented for $$1,500$ per day

The gas welder can be rented for $$145$ per day

Combined insurance for both pieces of equipment is $$30$ per day

Combined oil and fuel cost for both equipment is $$90$ per hour

The oiler is working full time on this job