What is it right???

[rogergm62]

Hello guys!!!!

Yesterday morning I was buying a t-shirt, but It doesn't have price (tha tag was missing), and I asked to the cashier...

-" Do you know how much does this t-shirt cost? "

but I think the right way was:

- " Do you know how much this t-shirt costs?

Is that true?, or maybe I'm crazy and no one of them is right.

Thanks in advance
Roger-The mexican alien...

[Mister Micawber]

.
Your version is certainly understandable, Roger, but more common and accepted are:

Do you know how must this T-shirt costs/is?
Can you tell me how much this T-shirt costs/is?
How much is this T-shirt? Do you know?
How much does this T-shirt cost? Can you tell me?
.

[sheena55ro]

Hello guys!!!!
Yesterday morning I was buying a t-shirt, but It doesn't have price (tha tag was missing), and I asked to the cashier...
-" Do you know how much does this t-shirt cost? "
but I think the right way was:
- " Do you know how much this t-shirt costs?
Is that true?, or maybe I'm crazy and no one of them is right.
Thanks in advance
Roger-The mexican alien...

What`s the price of this T-shirt?
How much is this T-shirt?
How much does it cost?