comfortable coinage
It's important to note that I mistakenly put "nickel and two dimes" where "nickel and two pennies" was clearly what I should have said.
Lesson learned: I am stupid.
comfortable coinage
The preferred return of metal coinage for a given transaction to keep one from being bogged down with unfavorable denominations.
As opposed to taking the full 57 cents change from the cashier, Bob opted to leave the nickel and two dimes behind and pocket only the comfortable coinage.