Money is not an object in Star Trek. It plays no part in society. Quoting: ISO
That's not true, even in the original series.
In the episode "The Apple" (childlike natives controlled by a machine called "Vaal") Spock nearly dies after taking a chestful of poison thorns. When Spock is revived, Kirk says, "Are you trying to get yourself killed? Do you know how much Starfleet has invested in you?" Spock responds with "One hundred twenty-two thousand, five hun..." and is cut off by Kirk with "Nevermind!"
Now, we don't know for sure what is is that was invested, though money/cost seems the most likely.
In the episode "The Trouble With Tribbles" Cyrano Jones is trying to sell tribbles to the K-7 space station's bartender as an item the bartender could then sell to tourists. Jones asks for "10 credits" each while the bartender counters with "1 credit", then reluctantly raises his offer to "2 credits", to which Jones replies, "Twice nothing is still nothing."
In this episode Chekhov remarks that Uhuru was going shopping (on the station) and that he was going with her.
In the episode "The Doomsday Machine" when Kirk, aboard the derelict Constellation, wishes out loud he had some phasers and Scotty remarks: "Phasers? You've got 'em... I have one bank recharged", Kirk responds with, "Scotty! You've just earned your pay for the week!"
There are probably other examples as well, but those are the one I remember off the top of my head.