What is the upgrade formula of Diablo II's hidden gold equipment?

The formula for upgrading the dark gold equipment of Diablo II is as follows:

I. 1 Lal

Second, 1 tal

Third, 1 Lum

Iv. 1 subject

No.5.8+12+ perfect jade+ordinary dark gold weapon = extended dark gold weapon.

Six, seven+13+ perfect sapphire+ordinary hidden gold armor = extended hidden gold armor.

Seven. No.65438+No.07+No.265438 +0+ Perfect Emerald+Extended Dark Gold Weapon = Elite Dark Gold Weapon (ladder only).

Eight, 18+20+ perfect sapphire+extended hidden gold armor = elite hidden gold armor (ladder only).