ReducerCode

def reducer():
	salesTotal = 0
	oldKey = None

	for line in sys.stdin:
		data = line.strip().split("\t")

		if len(data) != 2
			continue

		thisKey, thisSale = data

		if OldKey, thisSale = data
			print "{0}\t{1}".format(oldKey, salesTotal)

			salesTotal = 0

		oldKey = thisKey
		salesTotal += float(thisSale)