180405 insert multiple rows to mysql

Dear coders, project features two php pages page 1 : insert data to multiple rows in MySql db , data is called from table X and needs to be inserted in table [login to view URL] is one textfield 'quantity' where user can enter a figure, if not completed ,field must be inserted with a zero. I would like an ajax field to calculate total amount of items and total price while entering quantity page 2 : update data from multiple rows from table Y (using orderID where clause artikelCAT and customerID) Uncluding same ajax field as in page 1 This project is NOT ecommerce, but a helper for a salesman to create/maintain seasonal [login to view URL] experience with ecommerce project would be helpfull please only serious bids, work must be completed in 4 days after agreement. see attached file for db structure and more details