BUS: farming and banking

[Geoffrey Spear]

I PBA-withdraw a WRV [probably for 28 coins]
I PBA-withdraw a 2 crop [probably for 31 coins]
I PBA-withdraw a 9 crop [probably for 14 coins]

I mill 0 - 1 = X
I mill 0 - 1 = X
I mill 6 + 4 = X
I mill 6 + 4 = X
I mill 6 + 4 = X
I mill 6 * 9 = X