Flakes tend to bloat bettas. Bettas usually don't eat for the first few days. If you don't have a heater in there to keep the water at 78-82*, then he might not eat much at all.
According to Walmart's website, the average wage for a full-time store worker is $12.83 per hour, which translates into a salary of about $27,000 per year.
Wal-Mart Pharmacy workers report earning an average of $13.45 per hour. Adding overtime compensation raises that to $52.93. The most important factor affecting pay for Wal-Mart Pharmacy employees is your job title, though your experience level plays a role as well.