In 1961, the price of shampoo varied depending on the brand and size, but it typically ranged from about 50 cents to $1.00. Popular brands like Pantene and Suave were available at lower price points, while more premium options could cost slightly more. Adjusted for inflation, this would be equivalent to around $5 to $10 today.
shampoo going in your eye and much more...
It depends on the make of the shampoo it shouldn't be to much unless you go for the top quality professional stuff
Dopends where you go
Different prices.
Shampoo can remain in your hair if not properly rinsed out because some ingredients in the shampoo can be sticky or cling to the hair shaft. It's important to thoroughly rinse the hair to ensure all residual shampoo is removed. Using too much shampoo or not rinsing it out completely can also contribute to shampoo build-up.
Different prices.
5
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You lose so much hair when you shampoo is because your old hair gets washed away from your head
The telephone was Invented by Alexander Graham Bell 1874. Much before the shampoo
It's not good to use shampoo too much because it can dry out your hair.
The shampoo bottle will give you the dilution instructions. It will also say what area it will treat.