Information about zones in London and one day P?

Iam going to vist London for 1 day.and I will stay in youth hostel.My travelling plan to my residance is . From Stansted - Stansted Express Over ground service to London Liverpool Street. Underground central line west to Bond Street, Change to Jubilee line going south to Canada Water Underground from there take the Bus 381towards to Waterloo and stop on Salter Road.Can anyone suggest me in which zone I will travel?Becz iam going to buy one day P so I can get the right p for trip.