Can you help me to explain this quetsion?

During the months of January and February, Solitare Corporation sold goods to three customers. The sequence of events was as follows:

Jan.		6		Sold goods for $100 to Wizard Inc. with terms 2/10, n/30; goods cost Solitare $70
		6		Sold goods to SpyderCorp. for $80 with terms 2/10, n/30; goods cost Solitare $60
		14		Collected cash due from Wizard Inc.
Feb.		2		Collected cash due from SpyderCorp
		28		Sold goods for $50 to Bridges with terms 2/10, n/45; goods cost Solitare $30

Required: Assuming that Sales Discounts are reported as contra-revenue, compute Net Sales for the two months ended February 28.