• 費用ひよう — cost; expense
• 会費かいひ — membership fee
• 学費がくひ — school expenses
• 生活費せいかつひ — living expenses
• 交通費こうつうひ — transportation expenses

費 combines the money radical 貝 with the phonetic 弗 (ヒ). It originally meant “to lose value” and broadened to “spend / cost,” appearing wherever money, time, or effort is used up.

旅行費りょこうひが 高たかすぎます。
The travel cost is too high.

生活費せいかつひを 節約せつやくしています。
I’m trying to save on living expenses.