What is the ruling on working as an accountant for companies that produce cassette tapes and CDs?

Working as an accountant in cassette and CD production companies that sell products free of audible or visual content entails details:

1. It is not permissible to work if it is known or highly probable that they sell their products to parties that use them for unlawful purposes, based on the Almighty's saying: "And cooperate in righteousness and piety, but do not cooperate in sin and aggression."

2. It is permissible to work if it is known that they sell to those who use them for permissible purposes.

3. If the situation is unknown, one should consider what is predominant in the country. If the use of these materials is predominantly for unlawful purposes, then working with them is forbidden, and it is advised to seek another job for the sake of one's religious integrity.