Do the decoration multipliers stack

pokemon-quest

In Pokemon Quest, decorations acquired provide a bonus, whether they are set out at your camp or not. What's unclear to me is, do decoration bonuses stack? For example, the Dodrio Tent effect is "Size of Gray Ingredient Drops X1.5", and the Mechanical Tauros effect is "Size of Gray Ingredient Drops X2".

So, does owning both mean I get X3.5, or is it pointless to own the Dodrio Tent?

Best Answer

They stack, but having the Dodrio Tent and Mechanical Tauros won't grant you X3.5 grey elements drop, but X1.5X2 = X3 drops
Source : https://www.polygon.com/guides/2018/6/5/17429544/pokemon-quest-guide-spend-money and own experience with the game