This sentence means that "the amount of money paid for rent [by someone]" = in Spanish also referred to as "el alquiler", is including bills for electricity, gas, water...
When you want to rent a flat for example in Spain, you would ask the tenant "¿Cuánto es el alquiler? and he/she would reply something like "El alquiler es 500 euros, incluyendo facturas".
I hope this made it a bit clearer.
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