Two tailors, Alexa and Bonnie, sit down to do some embroidery. Alexa can embroider 4 shirts per hour, and Bonnie can get through
5 shirts per hour. In addition, the tailors had previously finished some shirts. Alexa has already completed 10 shirts, and Bonnie has completed 5 shirts. Alexa and Bonnie decide to take a break when they have finished the same total number of shirts. How many shirts, in total, will each tailor have finished?
