Ratio of Soil to Compost

I'm buying soil from a local supply store to fill a bunch of raised beds. They have two organic products I'm interested in:

  1. Soil: https://www.beegreen.green/products/soil-amendments/home-harvest-organic/
  2. Compost: https://www.beegreen.green/products/soil-amendments/compost/

I'm not sure how much compost is mixed into the soil. I'm leaning towards making a custom 50/50 ratio of soil to compost. But open to amping up the amount of compost and amending with coco coir to improve water retention ('m in Zone 9b and March-November we don't get any rain)

The soil looks like it's mostly wood chips mixed with some compost and some other inorganic components to help with drainage. So amping up the amount of compost seems prudent here.

What's the ideal ratio according to folks here?