Facility Layout - operations - productions

You run an custom t-shirt shop. You have a very specific process to make your t-shirts. First, you need to A) bleach the t-shirt, which takes 30 seconds. Then you add colors (done in any order) that take 10 seconds for red, 20 seconds for blue, and 15 seconds for yellow. After all the coloring, you need to iron the shift taking 100 seconds, and then finally fold the shirt taking 5 seconds. If you run your business 10 hours a day, and you want to make the most number of shifts possible in a day, what is the efficiency of your optimal facility layout?