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A drug company is deciding how much to invest in Research and Development into finding a cure for the common cold. The table below shows the company's demand for financial capital for R&D of this cold drug, based on its expected rates of return from selling the cure. Every investment has an additional 4% social return: that is, an investment that pays at least a 5% return to the drug company will create at least a 9% return for society as a whole. Estimated Value of R&D Projects That Provide Rate of at Least This High a Private Rate of Return Return to the Drug Company (measured in millions of dollars) 10% $220 $228 8% $238 79% $250 6% $264 5% $280 196 $298 3% $308 If the opportunity cost of financial capital for the drug company is 7%, the drug company will invest _ _in R&D if it receives both the private and the social benefits of this investment. $250 $264 $228 $308