When recording a bill for inventory purchase, we add sales tax and freight recording directly to expense account. When setting up the system, we talked about how we don’t necessarily have the tax and freight costs at time of receiving product so we set it up this way to add at time of entering the bill.  

This is creating a timing issue as we cross over a month end with a significant inventory purchase and the tax/freight skewing margins as they are expensed in month of bill and then customer invoice is following month.  

How can we set this up in the system better to avoid this?