I just worked out that in my (UK) house (with my children long gone!). The electric standby items are going to cost £452 UKP per year at October 2022 going forward cap levels, and of course more again at the next cap level(s) in 2023.
I have used 52 pence per kWh and 58 pence per day service charge. YMMV. Measurement was taken at the supply meter with no items full running. As a quick reference it works out that every 1 Watt on standby (October22 to December 22) is going to cost about 5.10 UKP over a year.
Standby items Include: PIR detectors, radios, Desktop computer+perifs (but no printer), TV, TV boxes, players, washing machine, dishwasher, AirCon, timers, boiler, chargers, HiFi, etc,etc. (the laser colour printer was gobbling 20W continuous to keep itself warm on standby so I keep it fully switched off except when in use and it is excluded from the cost figure above).
My standby figure also includes some essential "always on" items but only at their standby level. Fridge, cooker, microwave, deep freeze, and Land line DECT phone base come in this category. Also my BB Router(7W) and alarm system which are full on all the time albeit at low-ish consumption levels. So I think your standby items are maybe worth a thought. A plug-in Watt meter is useful for finding out which things are hogs to run on standby! C+