Final answer:
The average number of weeks of supply of houses on the market in this city is approximately 0.1377 weeks.
Step-by-step explanation:
To calculate the average number of weeks of supply of houses on the market, we need to divide the average inventory by the annual sales.
In this case, the average inventory is $18,750,000 and the annual sales are $136,459,000.
So, the average number of weeks of supply can be calculated as:
Average Number of Weeks of Supply = Average Inventory / Annual Sales
Average Number of Weeks of Supply = $18,750,000 / $136,459,000
= 0.1377 weeks
Therefore, the average number of weeks of supply of houses on the market in this city is approximately 0.1377 weeks.