Simplify the following text for a Grade 10 native English-speaking person.
Original: Economists generally think that this money supply increase ( monetary inflation ) causes the goods\/services price increase ( price inflation ) over a longer period .
Simplified: However , most economists today use the term `` inflation '' to refer to a rise in the price level . An increase in the money supply may be called monetary inflation , to distinguish it from rising prices , which may also for clarity be called ` price inflation ' .