Who can help translate this little joke in English? thank you

One day, I went to buy a pack of cigarettes. I bought a pack of 20 yuan's and gave it to my boss, 50 yuan. He gave me back 40 pounds, so I put the money in my pocket and left. But before I had gone far, he called me back and told me that "you forgot your cigarette". I was moved to tears and told me that he gave me 10 yuan. But the boss was also moved to tears and said to me, "hey, buddy, give me back that pack of cigarettes." I'll change it for you. " . With a new cigarette in my mouth, the pure smell touched me again. I couldn't help saying to my boss, "Please give me back this 50 yuan and I'll change it for you."

I sincerely translate sentence by sentence, hoping to be adopted! And I have seen this joke, and I died laughing at that time, haha!