Required information Sola unit unit December 10 $ 6.00 $60.00 10 @ $6.00 $ 60.00 7 December 20 10 @ $ 6.00 $ 60.00 14 12.00 240.00 20 e 240.00 12.00 Average cost 30 @ $300.00 18.00 December 15. December 15 21 14.00 210.00 156 P 14.00 210.00 150 $210.00 14.00 15 $210.00 14.00 15@ 210.00 14.00 $ Average cost Totals 30 B $540.00 18.00 210.00