A shop produces about $40$ orders per week. Each order takes an average of one hour of shop resources, but most orders are shorter and some are very long. Workers normally operate $40$ hours per week, but overtime is used in busy weeks; thus, in the long term the shop schedule averages $44$ hrs per week. The foreman has proposed giving priority to a key customer who has been complaining about long lead times. This customer accounts for $25$ percent of the orders. Estimate the effect on throughput time for the key customers and others if the priority system is implemented.