Going back to the late 80’s I went in to engineering planning. Part of my job was the monthly fuel costs:
Coal: £250,000
Gas: £1,200,000
Electricity: £1,400,000
Oil: £150,000
The funny thing is the first time I did the monthly calculations was February, I was scratching my head in March because the figures had shot up……….
28 days have February, 31 for March…….. I’d forgotten the old adage we were taught at school.
I still moan when the quarterly gas / electricity bill arrives at home.