Point of Sale developed with Angular 6 and Firebase

Developer with Angular JS 6 and Firebase a point of sale with these features(attached file) : ### POS WORKS OFFLINE Continue selling even when the internet goes down, will automatically resync your sales when you’re back online. DISCOUNTS AND NOTES Add discounts and notes to specific line items or to the entire sale. Notes will appear on your customers’ receipts. CUSTOM RECEIPTS Customize receipts with your logo and website. Choose whether to email or print receipts after a sale. LAYAWAYS AND ON-ACCOUNT SALES Allow customers to put items on layaway or make purchases on-account. Easily look up customer balances. RETURNS, REFUNDS & STORE CREDIT Refund past orders to store credit, gift cards, or back to the customer using the original payment method. CASH MANAGEMENT Track all cash movements from cash float to register closure, and reduce errors, theft and discrepancies. USER ACCOUNTS Create individual staff accounts and track sales. Easily customize permissions to restrict what users can see and do. ### Inventory VARIANTS AND COMPOSITES Add multiple product variants like sizes, colors, and materials and edit them all in one view. Bundle products together as composites to create gift baskets. BARCODES AND LABELS Import existing barcodes or create and print new ones. Effortlessly add products to sales, purchase orders or stock-takes. CENTRAL PRODUCT CATALOG Manage a central product catalog and sync your products across all your channels to eliminate errors and extra data entry. PRICING AND PROMOTIONS Manage pricing, discounts and markups effortlessly across all your products, outlets and customer groups. CUSTOMIZABLE TAXES Simplify tax handling and customize your taxes for different cities, countries, states, or even different products or outlets. STOCK ORDERS Always have your top-selling products in stock with automated stock orders and customizable reorder points. INVENTORY COUNTS Complete full or partial inventory counts, and speed things up by performing multiple counts at the same time. INVENTORY CONTROL See stock on hand, low stock information and inventory levels to help you make better decisions about your inventory. STOCK TRANSFERS Easily transfer items from one location to another, and check product levels across your stores with ease. DUPLICATE PRODUCTS Quickly duplicate a product and its variants and make minor changes before saving as a new product. ### Customers CUSTOMER PROFILES Keep all your customer information in one place — whether they shop with you in-store, online, or both. CUSTOMER PURCHASE HISTORY Customer transactions are saved to their profile where you can view their purchase history, loyalty and account balances. IMPORT YOUR CUSTOMER LIST You’ve worked hard to build your customer database. Easily bring those contacts over with a simple CSV upload. CUSTOMER GROUPS Treat VIP customers with discounts or targeted emails, or use groups to manage employee or wholesale prices.