I need auto sale invoice price

How to fixed saleinvoice price with purchase invoice price same time many purchase price get

Your question is not clear. What are you trying to fix? You can sell any item (goods or services) for any price you want. Sales prices are not dependent on purchase invoice prices. Are you asking about automatically changing sale price if purchase price changes? If that is your question, you cannot do that in Manager. If you are asking something else, please be more specific.