Debit cards work the same way as if writing a check -- and a person uses a check register to keep track of those check -- or in this case debit charges -- so you can reconcile those purchases when the monthly statement comes.
Since Chandler drives 20 miles every day and he work 5 days you take 5 times 20 to get 100 then you have to take 100 and times it by 100 to get answer of 10,000.
