假如你是某服装网店的老板Wang Gang, 你接到了来自客户LUCy的-份订单。阅读下面内容, 找出发货单中少发的物品, 并向客户写-封致歉信。
Dear sir,
　　We want to order your jeans, size M, eight pairs, at the price of RMB 100 per pair. T-shirt, size L, ten pieces, at the price of RMB 60 per piece. Skirt, size S, six pieces, at the price of RMB 80 per piece. Sweater, size M, seven pieces, at the price of RMB 75 per piece.
　　Please mail these goods by air as we need them by 30th April.
　　Please read the following shipping order（发货单）.

Description of goods	Size	Quantity	Unit price	Amount	Delivery Method
Jeans	M	6	RMB 100	RMB 600	by air
T-shirt	L	10	RMB 60	RMB 600
Skirt	S	6	RMB 80	RMB 480
Sweater	M	7	RMB 75	RMB 525

注意：1.文中不得出现考生个人信息;2.词数：80.—120。
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