I PBA-withdraw: four 3 crops, I think this costs ^34; three 7 crops, I think this costs ^24; a 4 crop, I think this costs ^6.
I mill 3+7=X, using ais523's Addition Mill. I mill 3*7=X and 3*7=X, using land #117 and land #167 I mill 3-4=X, using ais523's Subtraction Mill. -- ais523
