A charge of black cherry lumber $($dry$-$basis MC $=21\%)$ is going to be placed inside a laboratory

kiln which is newly equipped with a weighing system to monitor the average moisture content

of the lumber during the drying process. The kiln operator calls and asks you to determine

the volume of lumber that they can put on the scale without exceeding the scale$$s weight

limit of $5,000$ pounds. What value $($in board feet$)$ are you going to give them?