Variables...
Batch Size (gal)
Grain Bill (lbs.)		(Pounds of grain used)
Boil Time (hrs.)
Trub Loss (gal.)		(Crap from kettle)
Equipment Loss (gal.)		(Wort left in the mash tun)
Mash Thickness (qts/lb.)		(Average value is 1.33)
Grain Temperature (deg.)
Target Mash Temperature (deg.)
Wort Shrinkage (pct)
Grain Absorption Constant (gal/lb)
Percent Boiloff per Hour (pct/hr)
Results...
Total Water Needed (gal.)
Mash Water Needed (gal.)
Sparge Water Needed (gal.)
Strike Temperature (deg.)