[mellutussa]

> cassettes are returnable

Of the fraction that gets returned, how many are actually reused? It's black plastic with a shine to it and it'll show scratches easily. Does the factory even have the facilities to clean them out and refurbish them for next use?

[steezeburger]

Yes, tfa shows an excerpt from Bob saying they have the facilities to clean and reuse the cartridges.

[mellutussa]

tfa?

[chihuahua]

It's any acronym that's often used when someone wants to point out that a question could have been answered by reading the fine article that is being discussed. TFA = The F'ing Article.

[ahartmetz]

The f...ine article

I think the abbreviation was (and probably still is) popular on Slashdot

[drewzero1]

Or, more kindly, the featured article.

[callalex]

Others have explained, but here is the history:

https://en.m.wikipedia.org/wiki/RTFM