help please!

a merchant paid $3 each for golfing hats that he sold for $4 each. he therefore earned a gross profit of $1 per hat. by what per cent was the cost price increased to provide for this profit?

1. 20%
2. 30%
3. 33 (thirty three) 1/3%
4. 300%
5. none of these.

Respuesta :

Answer:

none of these, it should be 25%

Step-by-step explanation:

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