I want to know the answer to the following question:
How many marks did the church lose?
All the background I'm provided with is that "John simply tightened his existing measures and accrued significant sums from the income of vacant sees and abbeys: one 1213 estimate, for example, suggested the church had lost an estimated 100,000 marks (equivalent to £66,666 at the time) to John.". Is that enough to answer the question?