This table is used to enter expenses for this tool. The purpose is to be able to separately register all the tool expenses, especially for more expensive special tools. On one hand, you have income if the tool was manufactured by special order for a customer and then sold to that customer. This income is linked to the customer order. On the other hand, you have expenses for material procurement for tools, etc. These expenses are linked to purchase orders. You can also indicate that the customer has been invoiced for a particular income. The expenses are only shown here for information purposes.
The system automatically calculates all the income minus all the expenses, and allows you to enter a comment for each expense.