A construction company in a small town needs to hire workers to build a new community center. There are only 4 people in town who are qualified to work:

- Klara works full-time at the local gas station, earning $8.99 per hour

- Henry works full-time as an administrative assistant at the town hall, earning $19.99 per hour

- Alex works four hours a day mowing lawns, earning $11.99 per hour, and another four hours a day cleaning houses, earning $17.99 per hour

- Melody works full-time at a bank in the next town earning $22.99 per hour

What hourly wage must the construction company offer to get enough workers to fill 30 hours per day? Assume your answer is in dollars per hour and enter a numeric value only.