According to me very common reason behind this is increasing demand which make holiday price rise in summer.
A driving factor in the rise is the Gulf oil crisis. Prices are expected to rise at least 7% over the summer.
4$ dollars a gallon.
When prices rise, income buys less.
The sun does not rise on a summer evening.
Stock prices rise when most people want to buy stocks rather than selling it. In reverse, when people are more interested in selling products rather than buying it, the stock price moves down.
rise
The price of Ice Cream rises in the summer because it's more popular... resulting in more buying... resulting in higher prices
That is inflation.
When gas prices rise, other products soon follow. This is a sign of inflation, where the general value of money decreases and prices rise.
summer
because the summer is always hot
a rise in prices that occurs when currency loses its buying power