Hi ,
Going with your words "executed the work item then the sales contract will be displayed. Based on this I may get different scenario to implement." , you need to take the decision on the basis of workitem execution , so how you are planning to take that , because workitem will only display and since it is not the workflow , workitem will be over as soon as you click on the same and you wont be able to capture anything ( no decision etc ). Is that right ?
Thanks
Rakesh