can someone help me please, i got TWO answers, is 384 or 360???? thank you!!!!!

Activity Units Unit Cost Total Beginning Inventory 50 $250 Purchase (June $80 Purchase (June 15) 30 $7 $210 Sale (June 20) 40 $45 $1800 Sale (June 25) 20 $45 $900 Purchase (June 30) $10 $100 Assuming Big John's uses a periodic weighted average cost flow system, the cost of goods sold for June would be: $384 $280 $256 $360