Let an item price rate changes in four consecutive years be as follows: At the beginning of the first year, the item price was 20%. At the end of the first year, it was increased by 3%
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1. Let an item price rate changes in four consecutive years be as follows: At the beginning of the first year, the item price was 20%. At the end of the first year, it was increased by 3%. At the end of the second year, it was increased by 30% relative to its increased rate during the first year. At the beginning of the fourth year, it was decreased by 40% relative to its increased rate during the second year. At the end of the fourth year, it was increased by 40% relative to its increased rate during the first year.
