Hi<br/><br/>Could you please tell me the most natural way of asking such questions?<br/><br/><b>What's the total expence on your car every month?</b> (gas, service, etc)<br/><br/><b>What's the total expence on your children's education every month?</b> (school fee, tuition fee, stationery, etc)<br/><br/>Also, when do we use <i><b>outgoings</b></i>?<br/><br/>Thanks,<br/><br/>Tom