Exhibit 12(a) SOUTH JERSEY GAS COMPANY Calculation of Ratio of Earnings from Continuing Operations to Fixed Charges (IN THOUSANDS) Fiscal Year Ended December 31, ------------------------------------------- 2002 2001 2000 1999 1998 ------------------------------------------- Net Income* $26,280 $24,589 $24,929 $23,451 $17,972 Income Taxes, Net 17,372 15,693 16,703 15,445 12,299 Fixed Charges** 17,914 20,347 21,181 20,949 19,235 Capitalized Interest (359) (221) (24) (390) (167) ------- ------- ------- ------- ------- Total Available for Coverage $61,207 $60,408 $62,789 $59,455 $49,339 ======= ======= ======= ======= ======= Total Available - ----------------------- 3.4x 3.0x 3.0x 2.8x 2.6x Fixed Charges * Net Income before Dividends on Preferred Securities and Discontinued Operations ** Fixed charges consist of interest charges (rentals are not material).