補貨
比少左 - underdeliver
補返少左D貨 - cover the shortfall我地真係比少左15件貨你, 我會在下次補返貨比你: We did underdeliver the goods by fifteen pieces. I shall cover the shortfall in the next delivery to you.
We found that the last delivery/shipment was indeed 15 items short of the promised quantity. We will make up for the difference in the next delivery/shipment.