I mostly use pitch or punch shots out of sand, although flops do work sometimes - like on Bethpage.  I simply double the extra hit amount for the equivalent rough percent.

For example:

for 30-40 rough, I add 10% extra to the shot but for 30-40 sand, I use 20%.

If I go with full back spin I would add another 5%, so 25% for 30-40 sand.

Then for uphill shots out of sand I add 1 extra yard for each 3' of rise.

Then, if you have enough green in front of you, remember to take off something for the extra roll out you will get out of the sand.

For tourney greens I figure about 2-3 yards of roll out - again if I have enough green in front of the pin.

There are a lot of factors involved - sand percent, shot type used, amount of spin applied, amount of rise from the bunker to the green, green speed, amount of green in front of you and which course you are playing - as the sand performs differently on some courses.

For very difficult sand shots like 40-50 from 6-8' below the green don't be afraid to use a half strength full shot with a wedge if need be.

      Try this on green side bunkers. Add your distance, and your elevation, then if 30-40 buried, add 3 and 4. example (30 yards to hole, 5 ft ele, 30-40 buried, 30+5+3+4=42) I would hit it 42 with full backspin. That will give you a good starting point for green side bunkers. Distance from apron to hole, if not much distance, will come into play too, so, may have to hit further than you want to. And if big slope to hole, that will affect this method as well. But, if pin out there away from fringe, pretty flat green, you will be very happy with the results of this method.

If your wedge hits 60 yards max, you wont have much success hitting less than half the distance that club will hit. Meaning, if you add up all you numbers, and come up with 15 or 20, I doubt you will have much success with a shot like that. Would have to hit it a bit further than you want, or try flop or pitch. ( The above advise is for hitting Full )

You can flop out or pitch out on shorter shots. but when flopping, use same formula as above, but must aim left of hole a few feet and ding it. I normally , when using flop shot, try to strike ball at line before the ding, but have found you can flop out of sand and rough, when buried, but must aim left of hole, a few feet, but ding your shot instead of trying to hit at line before ding.Still trying to figure out 15 - 20 buried bunker play, Not 100% formula above works with barely buried green side bunkers.