Where can I buy this dry shampoo and how much does it cost?

You can get from normal drug store like waston and guardian. I used dry shampoo before during my confinement. However I felt my hair turned out very sticky and not comfortable at all. Thus I washed it immediately after that. Since then, during confinement I wash my hair every alternate day using chinese herbs called Da Feng Ai and boil it to wash my hair and bath. After washing hair I will blow dry it.