Who is responsible for the explicit costs of operating a mutual fund?

Explicit costs of operating a mutual fund include:

Management fees,

Operating expenses,

Custodial fees,

Record-keeping,

Marketing/distribution.

These costs are embedded in the MER (Management Expense Ratio) and are borne by the investors, as they reduce fund returns.

The manager (B) oversees operations but does not personally cover costs.

The sponsor (C) establishes the fund, and the distributor (D) sells units, but neither pays the ongoing operating costs.