I have never used a store bought sauce before. Because it is so easy to make a pizza sauce from scratch, in 15-20min. I start with a 28oz can of crushed tomatoes, which i drain all the juices. I then cook the juices with a mild boil to render out as much water, without sticking to the pan then cool it to room temp. Next in goes a 6oz can of tomato paste into the crushed tomatoes. Whisk together the tomatoes. Add garlic and onion powder, oregano, basil and whatever else you want to suit your taste. Whisk till smooth. Add the rendered little bit of juices, when the juices are rendered properly, it'll look like a few tablespoons of canned tomato sauce. Add a splash of EVO, and whisk together.
Sometimes I will omit the onion powder and EVO. And replace it with finely minced onions, sauteed in EVO. If you don't saute the onions, it gives the sauce a slight bitter taste.
I can't give exact measurements. I've always made my pizza sauce on the fly. And have always used a name brand of canned tomatoes. This is the way I learned from being from an Italian family.
On edit, it took me longer to type this than it takes me to make sauce.