Display Simple Market Data Graph Collected using QR code (Fixed budget 100 USD)

Hi, i got a simple project on building mobile application to collect product data such product name, product selling location and product price and product date through scanning qr code. Then the data is save and display through simple graph. The objective of the application is to capture the buying customer behaviour of specific product based on its price, location, time and product characteristics. So the business owner can make decision based on the graph. So the app will have two section which is qr scanner section and business owner section 1. Qr scanner section - Log in (capture name, email, age) - Scan the qr code - after scan got discount point 2. Business Owner application -Log in -Go to graph filter page (filter using several trait such product type, price, location, time range, age of buyer range) -Display graph -got export button to save graph image. Attached are the flowchart for project