Ready made POS with source code

Actualy what i need POS Ready made Software . i have a juice/ice cream shop in a mall, i have 4 devices, one in kitchen one in cashier, 2 in waitress. the waitress are roam around the mall. once they get order for juice, they will punch in there TAB, this tab is 4g enabled. so immediately cashier or kitchen team will come to know the waitress#1 ordered for a juice. they will prepare juice and click a button on there TAB as says juice is ready. So waitress#1 will come back to kitchen and take for delivery. Same way Direct customer for shop will directly order to Cashier. ...then next these all transaction can watch from office computer. Also office computer need to take reports, such as what is most selling juice, Who is frequently coming customer...etc too And all other normal functions of POS needed.