What Can I Claim Working From Home, Alberta, Canada?

I am beginning a new travel agent position January 2018 that requires I work from home Monday to Friday 9AM-5PM (4 days/month I drive to office for meetings/training). I will not be meeting clients in person but taking inbound calls to make corporate bookings. Work phone, computer and screens will be supplied. I am responsible for having internet with a minimum download/upload speed, printer/cartridges and other basic office supplies. I live in a duplex home with my wife and child that we rent. We pay for electricity, heat, water and internet cable. Also a small cost for renters insurance. I have converted a spare bedroom into a home office. The requirements are the office can be locked and that nobody else is in the home while I'm working. What items can I claim...internet, utilities, rent, office supplies such as printer cartridges, paper, pens, etc.?