Curable Cost - Alternative Investments

[Onda]

If curable costs are supposed to be increase the value of a real estate property, why do we substract this cost rather than add it to the total cost of replacing the property?

[Pyng]

Incurable and Curable costs

In calculating the value of private real estate property based on cost approach, I would understand that we deduct the incurable cost from the replacement cost because it can’t be changed and accordingly decreases the value but why do we deduct the curable cost?

[Onda]

this is so confusing. Everytime I do a cost approach problem, I always do it wrong