Price Calculation, Based on Unique Multiple Quantity , and as per Variant

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I want to build a website offering customized printing products like business cards, flyers, posters, A4 prints, 
letterheads and envelopes. I need help solving the following issues : 1. For each product i have 3-4 variants, whose price changes at different quantity levels,
which have to be in multiples of 50,100,150,500,1000. This multiple is also, different for every product.

I need to address the - multiple of 50,100,150,500,1000 ( this multiple will be unique to each product) - price calculation changes based on different variants, but also different quantity price will reduce.

Need Help