magento modification

Project Description: Updates prices offer : Update prices after price without VAT is displayed in xls providers offer ( price can be in USD , EUR, other coin ) - approx 8-10,000 SKU STOCK MANAGEMENT - set no quantitative ( no pc.) , But only : - in stock, - Limited stock - out of stock - delisted product (this product is no longer part of our offer) : must appear in google search ; must not appear in site search - The update by file type. xls containing: sku, price without VAT, currency, supplier, stock availability - only updates and others Update product availability (Compare SKU website +supplier ----> SKU + Provider provider offer) - Product delisted offer Supplier - - To appear in Google search site to exist but do not appear in web searches (this product is no longer part of our offer) (SKU) + Delete setting CRON for updating automatically prices/ offers Setting up taxes (VAT , added commercial ,and others) Update prices manually entered by an Exchange?