Following the XIRR syntax, enter =XIRR(values, date) where the value and date arguments are designated by their cells, and you’ll obtain the IRR.

Between Grasshopper for the main business & toll free line and a business cell phone it's more than enough.

Even me, the techno dunce, for awhile had a lap top, cell internet connection, to get on the MLS and a printer in the back with a power converter and paper, I could print forms from my car.

If you are insulating from the inside, then closed cell spray foam is your best option - it will prevent the warm moist air in the basement from making contact with the cool walls in the summer.

Simple, reliable, accessible from any device. 

I gave you my personal cell phone number, and devoted an entire day to touring your properties with you when you visited Detroit.The property you're referring to had been so badly mismanaged by your previous manager that when we took it over, it did not even meet the minimum legal standard for habitability.

He even has his cell number on the website.  

I combine them in one cell on my calculations.

And no utility connection costs, that was paid when the house was built, so all you'd be paying now is perhaps for a new water meter (the device itself, not the connection fee part). 

I've done this in numerous common areas (hallways/stairwells/etc) for the updating of lighting & for fire alarm devices.