The restriction x11,x12, x21, x22 ≥ 0 in the model means: a. Each decision variable must be positive in the optimal solution.
b. Each decision variable must be nonnegative in the optimal solution.
c. x11+ x12 + x21 + x22 ≥ 0
d. All of the above
e. None of the above

At december 31, 2016, pina corporation had the following stock outstanding. 10% cumulative preferred stock, $100 par, 107,810 shares $10,781,000 common stock, $5 par, 4,026,000 shares 20,130,000 during 2017, pina did not issue any additional common stock. the following also occurred during 2017. income from continuing operations before taxes $21,950,000 discontinued operations (loss before taxes) $3,505,000 preferred dividends declared $1,078,100 common dividends declared $2,300,000 effective tax rate 35 % compute earnings per share data as it should appear in the 2017 income statement of pina corporation