What is the ruling on working in the sale and display of Pharaonic statues and images, and books that discuss them, and what is the ruling on money earned from commissions on the sale of certain goods and currency exchange rate differences, with the employer's knowledge?

It is not permissible to produce or sell prohibited drawings. The money obtained from selling prohibited items is unlawful to acquire or benefit from. It must be disposed of in charitable ways if it cannot be returned to its owners. If it is possible to return it to its owners by annulling the sale and recovering the item, then that must be done, as the sale is invalid. This applies equally to the original price of the item, the money resulting from commission, or currency exchange differences.