If n is the number of  prints  in large  format out of 12 and the remaining ones are in small format, the expression for the cost of printing  in large format will be $ 0.95n.

 

The cost of  6 prints in small format will be  6 (0.16)

 

                                                                      = $0.96

 

The cost of  6 prints in  large format will be $ (0.95)(6)

 

                                                                      =$05.70

 

                                         Total Cost will be =  $5.70+ $ 0.96

                                                                       = $ 6.66

                                                                                ****