Using the calculator and AttacKat's suggestion of how to break it down, I was trying to go from Celeste Green to Lotus Pink. I didn't get there. I hit Snow White instead and I'm not sure why.

Feeding Screenshots Celeste to Snow:





From Snow White to Lotus Pink, 1 Pineapple, 1 Plum, 6 Valfruit. This is how I broke it down to avoid hitting the R/B wall:



Finally!


The calculator wasn't dead on, nor was AttacKat's suggestion. Nothing seems to be a shoo-in yet, but this method makes sense to me.