Trying to work out your pricing can be really really difficult, but it boils down to how much the customer is willing to pay. Here are some examples …
I am very British and I do like a nice cup of tea, so I am prepared to pay a little more to buy a branded name but only because I enjoy the taste. Over the years I have tested different makes and I admit to being influenced by adverts (although does the shape of a tea bag make a difference to how it is brewed?)
I have sensitive teeth, so that reduces the toothpaste that is available. For a long time I used a leading brand of sensitive toothpaste but having tried various other makes, I now use an own brand from a large high street chain. It cleans my teeth adequately and tastes ok, so there is no need to spend more.
I enjoy the occasional glass of wine, but I do like nice wine so I buy my wine from a popular Wine Club. Over the years I have got to know the vineyards and various grape varieties that I like. So I do pay more, and I accept that Supermarkets have some cracking deals nowadays, but I am happy to pay a premium to get the wine I want.
The price you need to charge is the price your customer is willing to pay for your product or service.