When you get to the cost code field, press F4 and see what's there. If there's nothing that jumps out as being for materials, perhaps one hasn't been set up - or perhaps they're lumped in under another heading. I assume the cost code OHD is "overheads" so maybe there's one representing [all] direct costs/cost of sales.
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Vince M Hudd - Soft Rock Software
(I only came here looking for fellow apiarists...)