Five friends P, Q, X, Y and Z purchased some notebooks. The relevant information is given below:

1. Z purchased 10 notebooks more than X did.

2. P and Q together purchased 25 notebooks.

3. Q purchased 3 notebooks less than P did.

4. X and Y together purchased 30 notebooks.

5. P purchased 6 notebooks more than X did.

If each notebook is priced ₹50, then what is the total cost of all the notebooks?