Multiple 1099 Vendor costs

[quickbooksfix]

I have a contracting client that uses a tremendous amount of 1099 vendors to get their jobs completed. They currently use EZ Time (a web based interface) to load their time data into QuickBooks. Many of their 1099 vendors have multiple billing rates they charge the company depending on the skill level doing the job. When they are bringing in the time data to create the bill they are stuck using one cost amount for each service item they are being charged. Is there a way to bring in multiple costs associated with a 1099 vendor to automate the bill creation process? Any help is greatly appreciated!