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Refer to the following sensitivity report, slack for sewing hours is: Variable Cells Final Reduced Objective Allowable Allowable Cell Name Value Cost Coefficient Increase Decrease $B$16 Bags produced Standard 540 O 10 3.5 3.7 $C$16 Bags produced Deluxe 252 O 9 5.285714286 2.333333333 Constraints Final Shadow Constraint Allowable Allowable Cell Name Value Price R.H. Side Increase Decrease $B$21 Cutting and Dyeing Hours used 630 4.375 630 52.36363636 134.4 $B$22 Sewing Hours used 480 0 600 1E+30 120 $B$23 Finishing Hours used 708 6.9375 708 192 128 $B$24 Inspection and Packaging Hours used 117 0 135 1E+30 18 O a. 480 Ob. o O c. 600 O d. 120