b$.$ Drilling down into the numbers, Max has determined that the dealership$$s new and used business appears to behave differently. He has determined that the turns of new vehicles are $7\mathrm{.}2$ per year, while turns of used vehicles are $9\mathrm{.}6$ per year. Holding a new vehicle in inventory for a month costs JVM roughly $$175.$ Holding the average used vehicle in inventory for a month costs roughly $$145.$ What are JVM$$s average monthly financing costs per vehicle?