A summary statement, an itemized statement and an explanation of benefits are not versions of the same page. Here is what each one can prove, and which to request first.
Small jobs carry almost the same fixed costs as big ones. Here is how hourly, minimum-plus-hourly, and flat-rate pricing each handle that, and which one holds up.
The order matters considerably more than the effort, and two of the steps take under a minute each. Almost all of the eventual cost is set before lunchtime.
Most families use all four and rarely decide the proportions on purpose. The order they are drawn on changes the total cost of the degree considerably.