Slava Shinderov 10/15/2015 4:29:07 AM
@Robert "Default/Calculate" formula is "calculated" when record is created and/or referred columns are changed, so you just need to change the formula as you need.
Maybe If([blue_items] + [red items] = 0, 1, [blue_items] + [red items]) will work for you. It's hard to say for sure as we're talking abstractly.
In any case, it's not clear for me how an "initial" value can help if you can't clearly specify criteria when initial value should be used and when formula should be used. And if you can do that then, I guess, the default/calculate formula is enough since you can always modify its as needed.