The total mass of a packet of chips and a packet of sweets is 789g. The mass of the same packet of chips and a packet of drink is 229 g lesser than that of a packet of chips and a packet of sweets. Based on the information answer the following questions. If the mass of a packet of drink is 231 g, then what is the mass of a packet of chips?

• A.  329 g                                    
• B.  436 g
• C.   315 g                                   
• D.   356 g