Expense, Cost
Dollars and shellfish are used to pay expenses and costs. Shellfish used to be used as currency, so they're like the coins that go with dollars.
Imagine opening your bank account and looking at all of your monthly expenses. Now drag the little dollar and shellfish icons over to cover all of those costs.
ひ
つい
None
What is the biggest expense and cost? It's the heat (ひ) bill.
When you see how expensive your heat is, you feel a heat going through your body too.