Costs associated with an object that can only be sent over the network (and executed
by the receiver).
NOTE: send_sir or send_not_sir fees are usually burned when the item is being created.
And execution fee is burned when the item is being executed.
Helper functions for computing Transfer fees.
In case of implicit account creation they include extra fees for the CreateAccount and
AddFullAccessKey (for Utility account only) actions that are implicit.
We can assume that no overflow will happen here.