David Wojciechowski recently purchased a chain of dry cleaners in northern alberta. Although the business is making modest profit now, David suspects that if he invest in a new press, he could recognize a substantial increase in profit. The new press cost $$15,400$ to purchase and install and can press $40$ shirts an hour $($or $320$ per day$).$ David estimate that with the new press, it will cost $$0\mathrm{.}25$ to launder and press each shirt. Customers are charged $$1\mathrm{.}10$ per shirt.

How many shirt will David have to press to break even?