Notes: A very cheap way to level Alchemy to 29 if you manage to get some Movalpolos water. Get a stack of Rock Salt and Movalpolos Water and you'll make 6 stacks of baking soda if you don't break any synths along the way.
1 Trumpet shell = 6 Carbon Dioxide (Lvl 21 synth)
1 Carbon Dioxide = 1 Movalpolos Water (Level 14 Synth)
1 Movalpolos water = 6 Baking Soda (lvl 22 synth)
So 6 shells = Roughly 216+ Baking Soda because you will HQ a couple water's through sheer luck. The only thing this costs you is the crystals and the rock salt, and is much more effective getting Alchemy to 29 than the alternate paths. You also don't lose nearly as much money by competing against higher level craters.