ABC Company has set the following standards for one unit of product: Direct materials: $0\mathrm{.}5$ pounds @ $$1\mathrm{.}00$ per pound; Direct labor: $1$ hour @ $$10\mathrm{.}00$ per hour. The company produced $35,000$ units and had the following actual costs: Direct materials: $18,000$ pounds at a total cost of $$17,280$; Direct labor: $36,000$ hours at a total cost of $$374,400.$ Compute the labor efficiency variance.