Oh, this is super easy. Don't worry about the 0x, it basically means nothing. However, the second two digits are hex coordinates (meaning they are numbers ranging from 0-f (If you don't know how that works: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f) so the way it works is you take the first digit (let's use your example, e) and go DOWN from the top of the sprite sheet (in this instance lofiObj3) and the second place value is counted from the LEFT of the sprite sheet. Where those intersect is where the sprite should be (you can test it using the value you gave as an example)
Hope I helped