inflation
a continual increase in the price of goods or services
Because of inflation, I can’t buy as much with my allowance as I used to.
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spike
suddenly increase
The number of travelers at the airport can spike during the holiday season.
photo credit: Chalermpon Poungpeth/Shutterstock
splurged
spent more money than usual on something
My sister and I splurged on new outfits to wear on our big trip to Spain.
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demand
the number of people who want to buy a certain product or service
There was a big demand for ice cream yesterday because the weather was so hot.
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income
money earned
For extra income, I decided to get a second part-time job.
photo credit: Motortion Films/Shutterstock