A friend has today, been and checked for us, our bill is 1016tl, reduced to 762tl, if we pay in the next 2 months.
The bill is based on the price shown on your tapu, and it would appear to be per property we have 2 names on our tapu but will pay less than a tapu with only one person on it, but the value of their property is more than ours.
Hope this helps.
Fran