I am a programming-illiterate admin who recently hired a free-lance programmer to write a simple trigger for our org and provide directions for deployment. He finished the job, and now directed me to write the test class prior to deployment. I had a look at the instructions and its Greek to me. He now offered to do it for me, at an extra cost. Does it make sense that this would not be considered a natural part of the trigger development and would require an extra cost?