Suppose we have the following insurance clauses specified in a sales contract. “Insurance to be effected by the Seller for 110% of invoice value against All Risks and War Risks and Strike Risks, as per Ocean Marine Cargo Clauses of PICC, dated 1/1/2009.” The premium rate of All Risks is calculated at 0.3% and the premium rate of War Risks and Strike Risks are calculated at 0.15% and 0.1%. The sales contract is on CIF basis and the invoice value is US$20,000.<br/> How much is the premium?<br/> A、121<br/> B、110<br/> C、100<br/> D、120