The Boyd company makes custom t-shirts. It gets blank t-shirts from a supplier. It puts the blank shirts in their shirt press machine, adds the necessary fabric ink, and out comes a custom t-shirt that they sell online for $30. In this story what would be classified as an intermediate good? Select one: a. The custom shirt that is sold for $30 b. Just the shirt press machine c. Just the fabric ink d. Both the blank t-shirts and the fabric ink