As I'm sure you're aware phe levels are suppose to be between 2-6 mg/dl. To convert phe levels from ummol/L (which is the large number you received) to mg/dl you divide by 60. This means that phe levels measured in ummol/L should be between 120-360 ummol/L, and your daughter's phe level would be 8 mg/dl.
If you are ever confused about how to understand phe levels don't hesistate to ask your daughter's doctor or dietitian. They are there to help :).