Roofing waterproof material, price and labor cost?

So stingy, don't give a penny. Is it the top floor? If you want to solve it at once, it depends on whether there is any construction waste buried under the eaves.

And is there any water (still leaking? ) If the floor surface is not very bad, it can be directly waterproof.

There is also whether there is a protective layer of cement mortar on the waterproof material. If there is, it must be destroyed and sbs waterproofing should be done again.