All-in-One Business Management Software Development

I'm seeking a comprehensive software solution for my petrol pump and transportation business, which has multiple branches. The software should be integrated with SAP and accessible via desktop, mobile, and web applications... (Budget: ₹12500 - ₹37500 INR, Jobs: Billing, Financial Accounting, HTML, Inventory Management, PHP, SAP, Server, Software Architecture, Software Development, Website Design)