続　このストーリーの笑いどころについて教えてください。

１．A friend’s daughter worked part-time in his office　while she attended graduate school.One morning,a call came　in for her.
“She’s not in yet,” my friend said.”Can I take a message” “I’ll call back later.” the woman said. At 11 o’clock, she tried again, and he reported that his daughter had gone to lunch.
The last call came at3:30.” Sorry, she’s left for the day.Anything I can help you with?” “Yes” the caller said.” How can I get a job with you?”

2.A customer called our rental store to ask about rectangular tables. ” We have six-foot and eight-foot tables,” I told him.
His response:” What’s the differnce?”