6 Smart Designs' inventory (for one item) activity for April is shown below. Smart Designs use a perpetual inventory system: Date 1 April Transaction Beginning inventory 7 April Purchase 9 April Sale 14 April Purchase 30 April Sale Units Unit cost 12 $37 45 $32 35 52 $38 25 Required a) Calculate the ending inventory and cost of each sale under the FIFO method. [5 marks] b) Calculate the ending inventory and cost of each sale under the weighted average method. [5 marks] [Total for Question 6 = 10 marks]