E-INV is an integrated document management, fast shipping, inventory management, business card scanning, quick printing document product synthesis, as an integrated APP, using E-INV to help you easily achieve product sales. Sell generation (purchasing warehouse receipt) details The product details information and the specific location sell product generation (quotation contract delivery order) product quotation are signed to the contract, the inventory is transferred and the quantity is reduced. The sales data can be quickly printed and exported. It is also possible to ship direct transactions directly and quickly.