Class : Class 7 
                                                                                                        
                                                                                                        Ans is 1073
Cakes sold  Monday is 39 more than Tuesday= 278-39= 239
Tuesday- 278
Wednesday=  double of cakes sold on Tuesday= 278*2= 556
So total= 239 +278+556= 1073
                                                                                                    
                                                                                                    Class : Class 7 
                                                                                                        
                                                                                                        Ans is 1073
Cakes sold  Monday is 39 more than Tuesday= 278-39= 239
Tuesday- 278
Wednesday=  double of cakes sold on Tuesday= 278*2= 556
So total= 239 +278+556= 1073
                                                                                                    
                                                                                                     
             
             
         
                                                                         
