Some things to consider
All of the ingredients have a long shelf life and are multi-purpose. If your budget allows for it, it pays to buy these in bulk.
Baking soda can be used for cleaning as well. Julia Watkins has some great tips on her blog and in her book Simply Living Well. Furthermore, it’s indispensable when baking cookies (if not sourdough, which I must say, I highly prefer… :))
Sea salt can be used for cleaning as well, and of course an essential for cooking and fermenting.
Additionaly, washing soda is has great properties too and can be used for everyday cleaning and scrubbing pots and pans. Hence it is also great for cleaning glass jars before using them in waterbath canning.