A funeral bill is a stack of separate decisions, not one price. Here is how to tell the required line from the four that are yours to accept or refuse.
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.
An adjuster applies a policy to a set of facts. Most claim disputes come down to whose description of those facts was written down first and in more detail.
Somebody collecting three quotes cannot assess the work itself. They can only assess the paperwork, which means the document is doing more selling than the price.