If you need to calculate inflation rate for one product your should take prices for it during period of time. For example takes price for pack of rice for each last ten years. Then you can calculate percent for price changing.

At first, people don't have enough time. Almost all people have job, time to other things that they want do for themselves. They don't want to waste time to unless things. Some time old parents like babies. But that babies are too big and unfortunately they don't have future ,like usual babies.