Which factor is an internal risk (blank) factors, such as incompetent staff, negligent employees, or employees going on strikes, are examples of internal risks.

Variable expenses are typically one time expense. Due to them varying, it's not always going to happen again, if they know the expenses will happen again, they are known as fixed expenses and can budget for them. Recurring expenses that happen at different times for different amounts are also variable expenses. Though it's hard to budget exactly for what the variable expenses will be, it's best to have a variable expenses budget to make sure the spending it kept under control.