Bike Attire Inc. is a manufacturer of bicycle tires. The cost of electricity is considered a mixed cost by the company. The variable portion of the electricity cost is assumed to be dependent on the number of units produced. The following is the related cost and activity data for the past six months:

$\backslash$table$[[$month$,\backslash$table$[[$Volume of$],[$Production$],[($number of units$)]],\backslash$table$[[$Total cost of$],[$electricity$]]],[$July$,70,000,$$$6,000$