A jeweller made a piece of uniquely designed diamond necklace and the selling price was fixed at Rs. 10,00,000. In making this piece, on the raw material, the jeweller had invested Rs. 3,00,000 and had paid a labour charge of Rs. 2,00,000. If 20% of the raw material cost was of gold, what is the actual amount the jeweller had spent in procuring the gold?

• A. Rs. 1,60,000
• B. Rs. 1,08,000
• C. Rs. 3,60,000
• D. Rs. 60,000