I understand that Amazon charges 15 cents per megabyte of book you upload. I want to get by with the smallest resolution that I can per image. 72 pixel per inch is likely the standard but is there a maximum inches-by-inches standard that a Kindle page has? I want to be covered for any Kindle device and not have pixelated images. I'm assuming images in Kindle books are mostly or all jpg and often saved as a 6 out of 12 size jpg in Photoshop.
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