Garber Plumbers offers a 20% trade discount when providing $2,000 or more of plumbing services to its customers. In March 2012, Garber provided $4,000 of plumbing services to Red Oak, Inc. and $1,500 of services to Cyril, Inc. Each of these customers was granted credit terms of 2/10, net 30. If both customers paid for the plumbing services within the discount period, what was the net sales figure for these two transactions?