Jonah's living room is 9 meters wide and 10 meters long. He wants to install yellow carpet that costs $8.00 per square meter. How much will it cost to buy enough carpet for the living room?

The living room has an area of 9 meters x 10 meters = <<9*10=90>>90 square meters.

So, Jonah needs to buy 90 square meters of yellow carpet.
The cost of 1 square meter of yellow carpet is $8.00.
Therefore, the cost of buying 90 square meters of yellow carpet is $8.00 x 90 = $<<8*90=720.00>>720.00. Answer: \boxed{720}.