Question
Oliver had four $20-notes and five $1-notes in his pocket. After he bought a windbreaker which cost $19.50 and another hat, he was left with $37.80. How much did he pay for the hat?
4 m

Click button first when a symbol is required. X

Oliver had four $20-notes and five $1-notes in his pocket. After he bought a windbreaker which cost $19.50 and another hat, he was left with $37.80. How much did he pay for the hat?