Newbie here and I just opened my first pool. 15k gallon gunite with DE Filter.

Here are my water results:

Total Hardness: 250
Total Chlorine: 1
Free Chlorine: 1
pH: 7.2
Total Alkalinity: 40
CYA: 70

So, do I shock first, then later add baking soda to raise my TA? Or do I increase my TA first, then shock?

Thanks in advance.
Derek