| A company has established the following equations for one of its products:Selling price (£ per unit)                = 40 – 0·008Q
 Marginal revenue (£ per unit)        = 40 – 0·016Q
 Total cost per week (£)                  = 2,500 + 8Q
 Q in each case represents the number of units produced and sold per week.
 At what selling price per unit will weekly profits be maximised?
 A   £8
 B   £16
 C   £24
 D   £32
 C |