After we finished work on the deck we drove around different places selling watermelons out of the back of Norm 's truck . We got about 150 for $ 100 and sold them 1 for $ 3 or 2 for $ 5 . We figured it 'd be an evening of easy money . Only we only sold about 20 so we did n't even make back our investment .
Why is the person selling watermelons ?
Pick the best answer from the following options:
- They are looking to make it their main business .
 - It is their primary income .
 - They are trying to make extra money .
 - None of the above choices .


They are trying to make extra money .