[FIX] Allow cost adjustments when stock is negative
[FIX] Allow cost adjustments when stock is negative

gdgellatly/OCB1,gdgellatly/OCB1,gdgellatly/OCB1,gdgellatly/OCB1,gdgellatly/OCB1,gdgellatly/OCB1,gdgellatly/OCB1,gdgellatly/OCB1