Margin by product price

[majoo]

hello, i have 5000 prodcts and how to set margin by product price ? there is a plugin for this job?
example:
products with price 0-10$ - margin 50%
products with price 10-20$ - margin 40%
products with price 20-30$ - margin 30%

[John2400]

http://extensions.virtuemart.net/products/quantity-related-price-calculation-detail

http://extensions.virtuemart.net/products/bundled-catproduct-content-detail

I would research the extensions, you pay you have a guarantee.