Correct the pricing info

For buying more storage, it says it's 500 MB for $20 a month. That must be a typo but I'm afraid to go through checkout to find out. If it were true, it would mean typingmind is charging a 178100% premium over S3. That's one hundred and seventy eight THOUSAND percent premium, which is obviously impossible. I could understand double or triple or even a ridiculous ten or one hundred times, but a HUNDRED AND SEVENTY EIGHT THOUSAND percent?