The controller of Sheridan Production has collected the following monthy cost data for analyzing the behavior of electricity costs.

$\backslash$table$[[,\backslash$table$[[$Total$],[$Electriclty Costs$]],\backslash$table$[[$Total$],[$Machlae Hours$]]],[$January$,$$$2,380,200],[$Felorusry$,3,010,390],[$March$,3600,490],[$April$,4800,690],[$May$,3,150,500],[$fune$,4,900,710],[$hely$,4040,645],[$Aupuast$,3\mathrm{.}880,530],[$September$,5\mathrm{.}000,675],[$Octaber$,4,200,610],[$November$,3,390,3\%0$