So I wanna apply a sale to my catalog that allows two parameters...

i figure either somehow set up one sale that says all products 10% off or 25% off if subtotal greater than 50 dollars.

Or set up two sales the first everything 10% off and a second sale 25% off if subtotal greater than 50 dollars and have it over ride the other sale.

Problem is i dont see how to do either of these. So a little help if anyone knows how and the sooner I can get an answer the better. thank you.