If a farmer in georgia who grows peaches has an initial investment in his business of -$1,000,000 and a rental equipment fee of -$100,000 and wages of -$100,000, in one year he spends $1,200,000 in business. In returns he makes $150,000 baskets of peaches which sell for $4 a basket which makes him $600,000 a year. He nets a loss of $600,000 in a year ($-1,200,000+$600,000)
If the interest rate on his savings, had he invested that $1,000,000 he would have had $1,040,000 by the end of the year in his investment account. If you add that to his shoe sales income of $45,000 he would have had $1,095,000 by the end of the first year. If he would have sold shoes instead of growing peaches he would have $1,695,000 more dollars by the end of the first year.