Decision Variables always have positive values regardless of the objective function or constraints. True False Question 12 A variable's slack value is the amount below the minimum or beyond the maximum for that constraint. True False Question 13 4 pts You manufacture 4 models of hand calculators, and you are convinced that the "Eichhorn" model is going to be the next big thing on the planet. How many can you make to generate a profit of $10,000 ? Sales Price =24.99 Manufacturing cost =13.11 Packaging cost =2.88 Shipping cost =2.95 (Round your answer to whole units)