Small Repair

This is the plug end of a lightning connector for charging an Iphone 5. It is a cheap replacement lead that my daughter bought because she lost the official one. Looking inside the plug I can see that you get what you pay for, the workmanship here was abysmal. This is the smallest repair I have ever done with a soldering bolt, it was difficult working with the solder while staring through a magnifying glass. The repair was successful, now what do I charge my daughter for the work and materials?