API C LegendaryCrafting.GetRuneforgeLegendaryUpgradeCost

Needs summary. cost = C_LegendaryCrafting.GetRuneforgeLegendaryUpgradeCost(runeforgeLegendary, upgradeItem)

Arguments

 * runeforgeLegendary : ItemLocationMixin
 * upgradeItem : ItemLocationMixin

Returns

 * cost : CurrencyCost []