Which part of “I’m really swamped today, could you have someone stay in the office and cover things” don’t you understand?
You had one guy stay here in the office for about an hour this morning, then he left to “get parts” and you let the other office guy take this afternoon off. You? You found it convenient to disappear to who-knows-where. All I know is when I called you to come in and talk to a customer, you were at home. At 11 o’clock.