iPad Point of Sale with RoR or PHP Backend

Point of sale iPad (Native App) I attached design references. i will provide user interface design and screens. I use trello for project management, slack for communication, hubstaff for work tracking. Agile development concepts necesary. Heroku and or amazon web services experience necesary. User-login. Product inventory, add products to the inventory with barcode scanner (bluetooth) add discount search product availability in warehouse and other branches add new customer for database for loyalty program (name, telephone, address, email, date of birth, loyalty card code, print loyalty card) home delivery: they write in the iPad the phone number and the customer information appears and assign the order if user is store manager the user is able to add new inventory to store with barcode scanner receipt printing with bluetooth scanner customer ticket print through bluetooth printer Web Platform 2 users: Store Manager & General Managers store manager can only see information about his branch Income Store income classify per branch, date Home Delivery Income Wholesale income Mercadolibre Income Facebook Income Affiliate Income Online Store Income Loaning Income Inventory ————————————————————— sales per branch screen date filter product inventory inventory invested in store product sales amount sales total supplier product cost sales cost sales with cash, credit or debit card % markup total markupt. (sales price - supplier price) most sold in the month, most sold in categories information per brand, and product create product categories fixed costs per branch ———————————————————————————————————————— warehouse inventory branch inventory warehouse inventory for website ———————————————————————————————————————— wholesales registry, sale date, products sold, sku, quantity of products sold, cost per unit, total cost of all pieces, supplier i bought the product, supplier cost, % markup, total markup, ———————————————————————————————————————— Expense list: date of expense, amount, expense description, form of payment (cash, check or debit or credit card) ———————————————————————————————————————— Supplier Information name, phone number, address, email, country, area code, internet webpage, logo, business name, contact name, delivery supplier logistics, payment details. ———————————————————————————————————————— Supplier product catalog ———————————————————————————————————————— customer list customer name, customer id, cellphone and phone, date of birth and age, address, email, purchase history, number of purchases, purchase history. —————————— inventory supply notifications (if shortage of products in store notify to main warehouse, if shortage of products low in warehouse notify supplier) ———————————————————————————————————————— consignments (per branch and customer) customer database, customer id, phonenumber, age and date of birth, address, email, cellphone, home delivery sales, customer purchase history, photo id, date business was established, branches #,cellphone, notes,proof of delivery, contracts, credit terms, form of payment, payment date., products delivered, products ordered, consignment price is higher —————————————————————————————————— inventory fulfilment supplier, ordered products, quantity, supplier cost, importation cost, sales price, markup,wholesale price, in-store price, wholesale markup. ———————————————————————— loyalty program rewards card printing through bluetooth thermal printer ——————————————