Fill your pot with water (leave room for the corn!) Add the sugar. Drop in your corn. Bring everything to a boil, making sure the sugar is dissolved in the water. Boil for no longer than 8 minutes. Remove from the water and let it cool enough for handling and eating. Handle it and eat it.
Usually the locksmith will be able to rekey the locks in his service van. Most of the locks will take about 10 minutes to rekey and the locksmith can charge you anywhere from $10 to $30 for each lock rekeyed. Most locksmiths will include a few free keys. The locksmith will also charge you for the travel time to you.
A locksmith will charge a minimum fee (often called a mobile fee) of $40-$100 plus anywhere from $5-$25 per lock cylinder (one per keyhole) for coming to your home and re-keying the locks. (The cost per lock will depend on the type of lock and the prevailing rates in your area.) For a typical home with four locks it can run anywhere from $60-$200, and costs can be even higher if the work is done off-hours, in the evening or on a weekend.