"Calculate the value of closing stock from the following according to Weighted Average method:
1st January, 20XX: Opening balance: 50 units @ Rs 4

Receipts:
5th January, 20XX: 100 units @ Rs 5
12th January, 20XX: 200 units @ Rs 450

Issues:
2nd January, 20XX: 30 units
18th January, 20XX: 150 units"

A. Rs. 765

B. Rs. 805

C. Rs. 786

D. Rs. 700

Answer: Option C