Mobile/Desktop/Laptop Friendly Car Dealership SALES & PURCHASE Agreement

I need a clean, modern-looking sales & purchase agreement that my dealership can use every day with both car buyers and trade partners. The same file has to open flawlessly on a phone, tablet, or desktop,... (Budget: $30 - $250 SGD, Jobs: Data Entry, Editing, Google Docs, Graphic Design, PDF, Print Design, Visual Design, Word)