A dryer uses hot air to dry wet feed with 20% moisture content on a wet basis to a final moisture content of 10%, also on a wet basis. To accomplish this, 4225 cfm (cubic feet per minute) of air at 50 °F and 50% relative humidity is preheated to 120 ° F before being fed to the dryer. The air leaves the dryer at 85 °F. Determine the mass flow rate (lbm/min) of wet solid that can be processed by the dryer.