Your high school English teacher would probably have replied to your question with "hiding behind the preposition" ("at"). But seriously, you must have a neighbor who's got some surplus baking soda you can "borrow".
We are under a shelter in place order here in Nashville, and now the police are beginning to enforce the rule, so when I told my wife that I needed some bath talc and some more Ibuprofen and was about to run over to Target, she said "sit down; I'm ordering it on line."
By the way, GOOD JOB!.....the bikes are absolutely gorgeous!