The Material Supplies account at Dar Al Fatina shows the following transactions: Material supplies purchased for cash AED1,000, additional supplies purchased for cash AED500, material supplies purchased on account AED3,500. Dar Al Fatina paid AED1,000 of the accounts payable. What is the Material Supplies account balance?

a. AED4,000

b. AED1,500

c. AED6,000

d. AED5,000