Stacking Boosts

So,there are a lot of things being said about the way boosts stack.Like the best one is applied or the last equipped one is applied.Also,all your boosts stack at test servers.Could someone test or find some info (because i couldn't)

Also,the way boosts stack changes.Lets say u have 2 items of 50% gold.Would u get 200% or 225% (first the 50% is applied and it gets 150% and then the other which gets to 150+75 -> 225)

Tests are appreciated btw.

Same-type Boosts stack additively so +25%gold and another but +15%gold will be +40% gold earn on quests and drops.

Damage boosts are different because of special Racial Tags.
There are Tags like Undead, Chaos, Elemental, Human and Dragon. Monsters can only have 1 racial tag on them so you need to know your stuff.
There is also the UNIVERSAL Damage Boost like the Global +15% damage of Burning Blade or the newer Burning Blade of Abezeth that gives +30% global boost.

A Racial Boost WILL stack MULTIPLICATIVE with the Global Boost so if you have a +51% boost to undead and a +15% Global boost then your damage will be +76.5% higher when fighting monsters with the undead tag AND ONLY THE UNDEAD, non-undead will just be affected by the 15% boost.

Boost stacking on the Test Servers and ONLY in the test servers but the Racial/Global Damage boost also possible in the Normal servers.
Of course you can't equip 2 weapons at the same time so you need either a piece of the AFDL set or one of the Dragonborn NCs to have the Racial+Global boost in the regular server.

One more thing: Some weapons has 2 Racial damage boosts in them like Chainsaw Katana with its +25% dmg to Undead and +25% damage to Humans.

Oh and the King of Weapons is the Necrotic Sword of Doom with its +51% DMG TO EVERYTHING.