First queston – neither makes sense to me.

Is this what you are trying to ask?

3. How soon do you need this product delivered?

4. What is the latest date you need this product delivered by?

neither…

3. We are currently short of this product in the warehouse.

neither…

3. What kinds of applications do you want from this machine?

The answer to this question would depend on the type of response you want

1. would give you a response from the customer like…

$10.00 to $2000.00

2. would prompt the customer to give you an exact amount…

$150.00

1) We have a shortage of this product in the warehouse now.

1) What kinds of applications are you looking for on this machine?

1)What is your price range?

2) We have a shortage of this product in our warehouse at present.

3) What application will you be making with this machine? (or) What will your application be with this machine?

4) BOTH sentences are correct; but have different meanings:

Price RANGE means lowest to highest [item may sell from $10-15]

TARGET PRICE means the price you’re aiming for; price you will accept, subject to negotiation or discussion.