[Table] header: Locomotive | Serial No | Entered service | Owner | Operator | Livery | Gauge | Status row 1 : G511 | 84/1239 | October 1984 | Chicago Freight Car Leasing Australia | Southern Shorthaul Railroad | SSR yellow & black | Standard | Operational
row 2 : G512 | 84/1240 | November 1984 | Chicago Freight Car Leasing Australia | Qube Logistics | CFCLA silver & blue | Standard | Operational
row 3 : G513 | 84/1241 | November 1984 | Southern Shorthaul Railroad | Southern Shorthaul Railroad | SSR yellow & black | Standard | Operational
row 4 : G514 | 84/1242 | November 1984 | Southern Shorthaul Railroad | Southern Shorthaul Railroad | SSR yellow & black | Standard | Operational
row 5 : G515 | 84/1243 | November 1984 | Chicago Freight Car Leasing Australia | Qube Logistics | CFCLA silver & blue | Broad | Operational
row 6 : G516 | 85/1229 | December 1985 | Aurizon | Aurizon | QR National maroon, yellow & black | Standard | Operational
row 7 : G517 | 85/1230 | March 1986 | Freight Victoria | Freight Victoria | V/Line orange & grey | Standard | Scrapped
row 8 : G518 | 85/1231 | February 1986 | Freight Victoria | Freight Victoria | V/Line orange & grey | Standard | Scrapped
row 9 : G519 | 85/1232 | December 1986 | Pacific National | Pacific National | Freight Australia green & yellow | Standard | Operational
row 10 : G520 | 85/1233 | March 1986 | Pacific National | Pacific National | Freight Australia green & yellow | Standard | Operational
row 11 : G521 | 85/1234 | February 1986 | Australian Wheat Board | El Zorro | SCT Logistics red, white & black | Broad | Operational
row 12 : G522 | 85/1235 | March 1986 | Pacific National | Pacific National | Pacific National blue & yellow | Broad | Operational
row 13 : G523 | 86/1236 | March 1986 | Pacific National | Pacific National | Freight Australia green & yellow | Standard | Operational
row 14 : G524 | 86/1237 | April 1986 | Pacific National | Pacific National | Freight Australia green & yellow | Broad | Operational
row 15 : G525 | 86/1238 | April 1986 | Pacific National | Pacific National | Pacific National blue & yellow | Broad | Operational
row 16 : G526 | 88/1256 | March 1988 | Pacific National | Pacific National | Freight Australia green & yellow | Standard | Operational
row 17 : G527 | 88/1257 | April 1988 | Pacific National | Pacific National | Pacific National blue & yellow | Broad | Operational
row 18 : G528 | 88/1258 | May 1988 | Pacific National | Pacific National | Freight Australia green & yellow | Standard | Operational
row 19 : G529 | 88/1259 | June 1988 | Pacific National | Pacific National | Freight Australia green & yellow | Broad | Operational
row 20 : G530 | 88/1260 | July 1988 | Pacific National | Pacific National | Pacific National blue & yellow | Standard | Operational
row 21 : G531 | 88/1261 | July 1988 | Pacific National | Pacific National | Pacific National blue & yellow | Standard | Operational
row 22 : G532 | 88/1262 | August 1988 | Australian Wheat Board | El Zorro | SCT Logistics red, white & black | Broad | Operational
row 23 : G533 | 88/1263 | September 1988 | Australian Wheat Board | El Zorro | SCT Logistics red, white & black | Standard | Operational
row 24 : G534 | 88/1264 | November 1988 | Aurizon | Aurizon | QR National maroon, yellow & black | Standard | Operational
row 25 : G535 | 88/1265 | December 1988 | Australian Wheat Board | El Zorro | SCT Logistics red, white & black | Standard | Operational
row 26 : G536 | 89/1266 | February 1989 | Pacific National | Pacific National | Pacific National blue & yellow | Standard | Operational
row 27 : G537 | 89/1270 | May 1989 | Pacific National | Pacific National | Freight Australia green & yellow | Standard | Operational
row 28 : G538 | 89/1271 | May 1989 | Pacific National | Pacific National | Freight Australia green & yellow | Standard | Operational
row 29 : G539 | 89/1272 | June 1989 | Pacific National | Pacific National | Pacific National blue & yellow | Broad | Operational
row 30 : G540 | 89/1273 | August 1989 | Pacific National | Pacific National | Freight Australia green & yellow | Standard | Operational
row 31 : G541 | 89/1274 | September 1989 | Pacific National | Pacific National | Freight Australia green & yellow | Standard | Operational
row 32 : G542 | 89/1275 | October 1989 | Pacific National | Pacific National | Freight Australia green & yellow | Broad | Operational
row 33 : G543 | 89/1276 | November 1989 | Pacific National | Pacific National | Freight Australia green & yellow | Standard | Operational [/Table] Answer this question based on the above table: What is the Serial Number of the Locomotive that Entered Service October 1989?

Answer: 89/1275