### Chinese: 主要目的是为了获取更高的利润，其实他们的原材料增加的成本最多不会超过3、4元钱。
### English: The main purpose is to obtain higher profits, in fact, the cost of their raw materials will not exceed 3 or 4 yuan at most.
### Errors: There is a major error of incorrect translation has stylistic problems at "the cost of their raw materials". There is a minor error of incorrect translation includes information not present in the correct translation at "at most".

### Improved English: The main objective is to gain more profits; the increased cost of raw materials is actually no more than 3 or 4 yuan.