Answer: b. shoe-leather costs
Step-by-step explanation:
This is the shoe-leather cost inflation. It refers to the time and effort expended by people to ensure that they are able to avoid their cash losing too much value to inflation. Includes for instance, going to the bank multiple times because you are holding little cash on hand so it does not lose value.
It is named shoe-leather costs as a play on words because it is assumed that the time and effort put will result in walking around alot and degrading the quality of your shoes.