the down bar option says either increase or decrease

Linksys is considering the development of a wireless home networking appliance, called HomeNet, that will provide both the hardware and the software necessary to run an entire home from any Internet connection. HomeNet's lab will be housed in warehouse space that the company could have otherwise rented out for $189,000 per year during years 1 through 4. The tax rate for Linksys is 20%. How does this opportunity cost affect HomeNet's incremental earnings? per year for the 4 years. (Select from the HomeNet will experience in incremental earnings of $ drop-down menu and round to the nearest dollar.)