Powdered "shock" can be a number of different chemicals: Dichlor, Trichlor, Cal-hypo in differing strengths, or Lithium Hypochlorite. If you already bought it, tell us what the label says and we can get you an equivalence in bleach. If you haven't already bought it, don't. The pool store told you an outright lie, either from ignorance or more likely because the profit margin is higher on the powders. You might have noticed the store was full of buckets and boxes of chlorine stuff...
Well.... from what I have read, the goal is to get to breakpoint chlorination which means add 10x the combined chlorine... Combined chlorine was 2.87. I have liquid chlorine 10% and the bags of shock that they sold me. So whatever is the best way to achieve the goal is what I want to do.
Well .... you did not read that here. Breakpoint chlorination is non-sense.
You need to follow the process.
You need to decide if you want to learn the TFP method that we teach or continue to try the pool store methods. Trying to mix advice is just going to cause confusion, likely not work, and waste everyone's time and your $.