Letters / Help me to write exemption letter [6]

dear sir
I am writing this application for exemption in B3 economics classes.My A-levels provisional result have been issued and I am eligible for exemption in B3 Economics paper.I take up the responsibility of loss loss of studies in the classes

I have attached the copy of my a level results
thank you

please help me to write the letter.i am eligible for exemption and i am writing the letter to principle to allow me to skip classes and refund the tution fees.