Estimate the cost of applying paint for a three$-$coat application on $100$ square feet of exterior

new wood wall for a residence. Assume labor cost for a paint is $$19\mathrm{.}01$ per hour. The labor productivity is

as follows

For the first coat of paint: $0\mathrm{.}9$ hour per $100$ square feet

For the second coat of paint: $0\mathrm{.}8$ hour per $100$ square feet

For the first coat of paint: $0\mathrm{.}8$ hour per $100$ square feet