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Emerald Ltd has accumulated the following data for the most recent 6month period. lFlnirem labour hours Maintenance services July 2?,000 $46,000 August 20,000 29,000- September 21,000 40,000 October 8.000 H.000 Novem ber 12,000 20,000- Decem ber 9,000! 20,000 Management believes that maintenance cost is a mixed cost that depends on direct labour hours. Using the high-low method to estimate the variable component of this cost, the estimate would be closest to: Select one: Q A. $0.69 per direct labour hour 0 B. $0.66 per direct labour hour 0 C. $1.56 per direct labour hour 0 D. $1.53 per direct labour hour