Keep in mind I am not smart. What is the formula/math/etc. to find out the maximum print size of a photo? For example, say a photo is 1000 pixels by 1000 pixels, 300 resolution - how do I find out the maximum print size that it will still look good and not go bad? Do I go by what photoshop tells me is the image size (for example, if it says 10 inches by 10 inches when I go to resize)? Thanks in advance.