Raising multiplier
Not a quick way, no. If you reach the bonus levels after level 37, you get chances at donuts that you could save to buy premium multipliers, but that would be pretty slow going.
Forum Discussion
Get up to 5 stars -- that can be accomplished with no donuts and will get you 5%.
There are lots of items that give you 2%, but they cost 40 donuts or more. That's why the grumple, at 25 donuts, is a good deal.
For a more accurate calculation of your multiplier, you can count how much XP you get when you buy a weather station. The base is 1000 XP. Any XP over this is your multiplier. So if I get 1603 in XP, I know my multiplier is 60.3%.
As for placing the items in inventory but them not affecting your rate, place them and then exit out of the town and then do the calculations again.
There are lots of items that give you 2%, but they cost 40 donuts or more. That's why the grumple, at 25 donuts, is a good deal.
For a more accurate calculation of your multiplier, you can count how much XP you get when you buy a weather station. The base is 1000 XP. Any XP over this is your multiplier. So if I get 1603 in XP, I know my multiplier is 60.3%.
As for placing the items in inventory but them not affecting your rate, place them and then exit out of the town and then do the calculations again.
