如何使用 "undercharge" 造句

1. We undercharge mr. smith and have to send him a debit note .
我们少收了史密斯先生的钱,只得给他寄去一。
2. Is it usually an overcharge or undercharge ?
通常是多算还是少算?
3. Many new technology companies feel compelled to undercharge for their technology in an effort to break into the market .
许多新技术公司不得不为他们的技术,少收,努力打入市场。