Poor inflation brain

I am just reading about Slovenia's 4.9% annual inflation published by the Statistical Office of the Republic of Slovenia and followed by the following quoted description "The prices of services increased by 7.4% on average, and the prices of goods by 3.6%. Goods daily consumption was more expensive by 4.7%, semi-durable goods by 2.3% and durable goods by 0.6%". And, of course, the following record about the 18.8% reduction in electricity prices due to the exemption from the payment of OVE and SPTE is the least clear to me. 

Since, of course, I am already "older and have holes in my memory, or rather my memory is already slow", I even tried to check the electricity bill, which is supposed to be so much lower now. Last November (2022), I paid 91.47 euros for 542 kW. This year's (2023) November bill amounts to 92.9 euros for 513 kW. That is to say, according to my outdated calculation skills, I can determine that I paid less for higher consumption in the month of November 2022 than in November this year and I cannot find the 18.8% reduction in electricity. Maybe it will be better to wait until January 1, 2024, when the electricity distributor announced a new price list and sent me an email about the increase in electricity prices.

 I can't find the predicted inflation on groceries either. I can pay the same price if the card's club coupon says 35 to 50% off the price of the product. 

I think I'll have to fix my memory brain cells and calculation abilities or else read the issued invoices. Maybe the problem of not understanding the officially announced inflation, which was determined by the Statistical Office of the Republic of Slovenia, is that I judge and evaluate everything unprofessionally, despite my master's degree in science and I evaluate everything based on personal experience.