Here's a fun tool which is also a fantastic resource for writers and educators. What would a pint of beer have cost back in 1976? How much does that 1989 salary equate to nowadays? This "Historic Inflation Calculator" tool will answer that for you, back and forth through time.
Writers keep all sorts of information. I have a folder of very old bank statements and receipts - not for tax purposes, but so that when I write any story set in the past I can go through items from the time, and identify how much I paid for things. The inflation calculator tool is a handy add-on for that.
Inflation is a weird thing. I sometimes worry about the day when buying a bar of chocolate will cost me a million pounds. Then I lie awake in bed wondering why humans haven't decided to stamp out inflation so that it exists no more. Then I decide that I'm weird and go back to sleep.