Surcharge should be automated in pricing when order value is less

Question

Dear all,
There is a client requirement where in if the order value is less than 1000 Rs. then a min surcharge of 2% has to be calculated in the pricing procedure automatically.
Right now they are giving this condition manually.
There is a cond type : SURG  this has to automatically flow into the system say 2% or 3% or Fixed amount say 200 or 300 ( client is yet to decide on the amount ) when the  order value that is when the user input  PR00 which is  lesser than 1000 then this surcharge condition type with whatever percentage or fixed amount kept in the condition record   should come automatically.
Valuable inputs required.

Answer 1

Hi, ram
The thing is I dont want the system to replace the PR00 price. when ever the PMIn condition type comes.
The senarion is  
When ever the sales order value is less than 1000, say that PR00 is manually entered for 800 or 900 or 999 then there should be surcharge calculated say for 2% on basic price and the basic price should be there.  and this surcharge condition type should come automatically when the price is gettng inputed for 800  through PR00.
And then finally total value will be displayed.
Hope this above   example is clear , will the above logic which you have mentioned will work on this case.?