[Frameworks] B&W chemicals - how many uses?

[John Woods]

So the common Kodak packages of D-76, D-19, Hypoclear, etc. usually make 3.8 
liters or 1 gallon. I was wondering how much film you can process with this 
amount with consistent results. I usually process batches of 3-4 super 8 
cartridges at a time and then dispose of the chemicals. I'd like some advice on 
whether I could be more efficient with the chemicals or if I'm depleting the 
chemicals with the amount of film I use. Thank you!

John Woods