Quantity Discounts & Pricing for WooCommerce

i would like to keep the original price as is and start the discount on the 2-10 quantities. for example.
if the product costs $200 and its added to the cart, they pay $200. I would like the product to be $50 when adding an additional item. so if there is two in cart. it would be a total of $250. this plugin does not do this. So if they add 3 items it should be $300, 200 for the first one and 50 for the second and third item. There could be a button that activates the discount after the first product. hope this makes sense.