I am using the bulk and portion option. we have 2 prices. Retail and price 4. Price 4 is for members. When you sell a portion then put in the customer name it seems to add costs to it. If you then add a second portion it seems to correct itself. Bottle of wine and glass of wine. 4 glasses in a bottle. Retail, £2.40. price 4, £2.20. when you add the glass to the sale it comes in at 2.40. then pick customer. Price is now set at £4.25 instead of £2.20. add a second glass and it now corrects itself to £4.40. if you pick the customer first it seems to work out ok. any suggestions or do we have to add customer first?. It works ok with all single products. Only ones that have parts or bulk