For custom bags order,due to custom materials time circle and cutting wastages we always have to prepare a little bit more materials than pre-production calculation required and most probably there would be some extra pcs more or even some pcs in shortage due to quaity control in several aspects.But we will maintain the overflow or shortage within a reasonable range of ideally 5% and may extend to a maximum 8% in some cases.This is a point of mutual understanding and acceptance.