The cost of erecting a building is $1,000,000 for the first floor,$1,100,000 for the second floor, $1,200,000 for the third floor and so on. If the lot and the other initial costs are$5,000,000 and each floor produces $200,000 annual income how many floors should be built to maximize profit for the first 10 years? 2. Originally Posted by rockstarzy The cost of erecting a building is$1,000,000 for the first floor, $1,100,000 for the second floor,$1,200,000 for the third floor and so on. If the lot and the other initial costs are $5,000,000 and each floor produces$200,000 annual income how many floors should be built to maximize profit for the first 10 years?