Throughput ratio

Hi! There was a question on the exam along these lines. Still thinking of the question and was confused on how to go about answering it and still wondering what the right answer would have been. A factory makes shirts pants and jackets the processes take 10 hours a day. They can make 1,500 shirts an hour. If selling price is $30 and materials is $10 and labour is $2.50 an hour and operating expenses is $250,000 a day, what is the throughput ratio.