Excel Formula Writing

Closed - This job posting has been filled and work has been completed.
Hourly Job
As Needed
Less than 1 month

Details

Hi.  I need someone very experienced in writing formulas in Excel.  I am creating a ceramic tile calculator for tile installations that will automatically calculate the materials we need for each job and also the amount of labor we will be paying out to subcontractors.  

The ideal person will have experience comparing data sets and then choosing a result based on the comparison. I already have the calulator started but need help finishing.