Help with vba to compare columns, utilize formuala, to obatain a balance of hours

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The overall need is to be able to determine, where the work flow is at, compared to the work volume contracted. If we are going over budget, we need to be able to identify why, and generate the necessary paperwork to our client, to accomodate the new costs, and to be able to justify why we have gone through the contracted budget. In order to be more responsed to the engineering costs/construction costs generated by delays, we are hoping to be able to utilize these two worksheets to assist in managing that responsiveness. Due to costing accountability needs, I need to be able to compare departmental work requests for our department and compare it to the Input Task Worksheet. (Worksheet 2), by it's task code. (Column identified as "NEW")

We populate a worklog utilizing the information provided in lines 2 thru 9. The column I would like to add is column C as a pulldown. That code represents the code on the 2nd page of the workbook. That line item provides the information as to whether that work is still within budget, by utilizing the formula identified. (different document types require different processing times). All the data in green fields will be placed on the worklog by an admin or tech.

The lead will populate Column C, via the pull-down list I set up, based on the 2nd worksheet category.
Compare the actual hrs spent from column O of this workpage, to theTASK worksheet line entry for that task codes, identified budgeted hrs, column F.
Calculate the hours remaining after this action (line entry), has been completed, and publish the remaining hours in Column S of this worksheet.
Track all of the hours remaining, for multiple entries, until the approved balance of hours have been reached.
If there are no remaining hours, advise in some manner that "A PDN must be completed for this activity".

I have attached a sample of the workbook.

Thanks for the future assistance!!!