We shop where we know things are cheapest.
We have six superemarkets, two chemists, two post-office and one cheap shop selling clothes and household linen within a short bike ride, plus three other supermarkets that are a little dearer.
7 kms away we have even more shops including DIY stores and book-sellers.
We check the supermarkets' adverts and try to always remember to check our receipts, especially if we buy anything that is on offer.
It is suprising how often cash-registers do not record the reduced price, but only the normal price for the goods.
We shop once a month for all the things we know we will need, toilet paper, detergents, coffee etc. and after that only buy fresh goods like milk.
Here the rising prices are not due to the pandemic, it hardly affected food prices. The rising prices just now are entirely due to the cost of electricity, petrol and diesel, which obviously makes manufacturing or transporting goods more expensive.
The increase in heating and light bills makes it necessary to be even more careful about chosing the cheaper of two packets of the same product when shopping, as our income (pensions) are fixed.
I imagine we are all in the same boat there.