In a candy company, separate streams of sugar, corn syrup, cocoa, vanilla extract, and milk enter a mixer-boiler and out as fudge. The sugar (sucrose, C12H22O11) is purchased from a sugar farmer who used to be a chemist and who packages it by the lbmol, and the process uses 1.75 lbmol/hr. Butter is fed to the process at a rate of 60 lbm/hr, corn syrup is fed at a rate of 3.5 gal/hr, and cocoa is fed at 17 lbm/hr. Finally, vanilla extract is fed at a rate corresponding to 1 lbm of extract for every 30 lbm fo sugar. How many gallons of milk per hour must be fed to the process for a total fudge production of 830 lbm/hr?