Thomas withdraws $1000 in 20 dollar bills from the bank account.  He loses 10 bills while getting home.  After that, he uses half of the remaining bills to pay for a bill.  Thomas then triples his money.  He then converts all his bills to 5 dollar bills.  How many 5 dollar bills does he have?
Give me a solution to this problem
He withdrew 1000/20=50 bills
So he has 50-10=40 bills left over
He uses half the bills to pay for something, so he has 40/2=20 bills
He triples his money which gives him 20*3=60 bills
So he has 60*20=$1200
Converting to 5s means he has 1200/5=240 bills