Normally you would do one of two things -
either change the price in the Products table and update the Invoice
Line Items table with the current price when doing the data entry or
have a Prices table (ProductID (PK1), EffectiveDate (PK2), Price)
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.