What is the value for the REDUCED COST for the variable S5 and what does the value mean?

Cell Name Original Value Final Value $N$2 putaway Utilized 1 1728.793855 Cell Name Original Value Final Value Integer $B$11 best F 1 1728.793855 Contin $C$11 best B1 1 144.9881496 Contin $D$11 best B2 1 187.8558478 Contin $E$11 best B3 1 228.1879195 Contin $F$11 best S1 1 636.1479438 Contin $G$11 best S2 1 501.605712 Contin $H$11 best S3 1 349.681791 Contin $I$11 best S4 1 182.680913 Contin $J$11 best S5 1 0 Contin $K$11 best S6 1 0 Contin $L$11 best S7 1 0 Contin $M$11 best S8 1 0 Contin Cell Name Cell Value Formula Status Slack $N$3 Year 1 Utilized 430 $N$3=$P$3 Binding 0 $N$4 Year 2 Utilized 210 $N$4=$P$4 Binding 0 $N$5 Year 3 Utilized 222 $N$5=$P$5 Binding 0 $N$6 Year 4 Utilized 231 $N$6=$P$6 Binding 0 $N$7 Year 5 Utilized 240 $N$7=$P$7 Binding 0 $N$8 Year 6 Utilized 195 $N$8=$P$8 Binding 0 $N$9 Year 7 Utilized 225 $N$9=$P$9 Binding 0 $N$10 Year 8 Utilized 255 $N$10=$P$10 Binding 0