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Riverbend Semiconductor Corporation (RSC) is an Atizona corporation engaged in the manufacture and sale of semiconductors and other computer equipment. RSC spent $4.8 millon on research and experimentation costs, and all its research and experimentation activity was conducted in the United States. The company handles its export sales through sales branches in freland and Taiwan. Total foreign sales from the foreign branches were $8.72 million and worldwide soles were $21.8million. What amount of the total research and expenmentation expense will be apportioned to foreign source income? Note: Enter the omount in dollor volue not in mililions