Rostered breaks

I have a roster.
And I currently use a formula that takes a half hour break out of the worked hours, but also inputs the data as blank if S/L, A/L,STAT or -. is entered into the shift boxes.

What would be fantastic is if it only calculated the hour hour break if the shift is more than 5 hrs long, and calculates an hour break if the shift is more than 10hrs long.

So if the shift is only 4hrs long then there would be no break subtracted.

I shall attach an example workbook.

If theres any feedback on making the formulas simpler or if i missed an easy way to do this please let me know.roster snapshot.pngroster snapshot.png

That works almost perfectly, but on shifts over 10hours long I need it to deduct an hour break not half an hour.

Is there a way, perhaps in a separate cell(to determine on floor selling hours), to deduct a further half hour if the shift begins at 8:30am as he first half hour would be store setup.

Brilliant! Thanks so much for the help guys!