I have tried the following HIT many times. "Type the text from the images, carefully. Productivity and bonuses guaranteed." There are a series of items to type. They have a small training session and then a few final items. I never seem to pass. The problem is that some of the commas look like decimals and vice versa. There is also a final test of a blurry item and it is not clear if it should be skipped or tried. I must have tried 10 times with different combinations and it never tells me I passed.
It is difficult to see some of the texts. I've never done those but from what workers say, some of them are going through the same thing as you are. Apparently the requester doesn't respond to messages and these HITs approve in 30 days. You're probably better off doing other HITs over this. Not worth your frustration.