Is this balanced?

[Aeroblyctos]

I'm doing in my campaign money system and I would like to have some feedback is this balanced. Currently the system goes like this:


WHAT? | AMOUNT | PRICE | EXTRA PRICE
Armor = Armor amount x 10g x 3.0
Damage = Damage amount x 4g x 1.5
Attack Speed Bonus(10%) = Attack Speed Bonus Amount x 20 x 2.0
Hit Point Reg = Hit Point Reg amount x 15g x 2.5
HP Maximum(100) = HP Maximum amount x 50g x 2.0
Mana Point Reg(50%) = Mana Point Reg amount x 50g x 2.0
Mana Maximum(100) = Mana Maximum amount x 75g x 2.0
Stat(1)(agi, int or str) = Stat amount x 6 x 2.5

So it works like this:
Amount of damage/armor/etc X how costy it is X plus price(will increase rapidly because better items will of course pay much more).

So example:
Ring Of Mana - Increases the Hero's rate of mana regeneration by 50% and the mana capacity of the Hero by 75 when worn.
=> 1(amount) x 50g(price) x 2.0(extra price) = 100(total price)
=> 0.75(amount) x 75g(price) x 2.0(extra price) => 112.5(total price)
=> 100 + 112.5 = 212.5 => 210g
=> Total price: 210g

Other example:
Ogre Armor - Increases the armor of the Hero by 2 when worn.
=> 2 x 10g x 3.0 = 60
=> Total price: 50g

Another example:
Mythril Vest - Increases the armor of the Hero by 3 and also increases the Strength, Agility and Intelligence of the Hero by 3 when worn.
=> 3 x 10 x 3 => 90
=> 9(3int + 3str + 3agi) x 6 x 2.5 => 135
=> 90 + 135 => 225

g = gold

So, is this balanced? Any improvements? What do you think? At chapter 1 you can have about 250 gold maximum if you complete all optional quests etc.