HEG Furniture, Inc. manufactures three types of tables (country, contemporary and classic) using three types of machines. The time required to produce the tables on each machine is given in the following table. The unit price and manufacturing cost of each type of table is listed below. Management has determined that at least 20% of the tables made should be country and contemporary, and at least 30% should be contemporary and classic. In addition, the total expense of classic tables should be no more than half of the total expense of country tables. The marketing research team is very confident that all tables produced will be sold out. The company wants to maximize its revenue in order to gain market share. Let X1 = Number of country tables to produce X2 = Number of contemporary tables to produce X3 = Number of classic tables to produce Which constraint must be satisfied by the contemporary and classic tables? B. X1 + X2 0.3 [X1 + X2 + X3] D. X1 + X3 0.2 [X1 + X2 + X3] A. X1 + X2 0.2 [X1 + X2 + X3] X2 + X3 0.3 [X1 + X2 + X3]