Antonia notes that an electronics store is offering a flat $$20$ off all prices in the store. Antonia reasons that if she wants to buy something with a price so $$50,$ then it is a good offer, but if she wants to buy something with a prices of $$500,$ then it is not a good offer. This is an example of:

Group of answer choices

the proper application of the Benefit$-$Cost Principle.

inconsistent reasoning because prices are sunk.

rational choice because saving $40\%$ is better than saving $4\%.$

inconsistent reasoning; saving $$20$ is saving $$20$