Access Systems allocates manufacturing overhead based on machine hours. Each connector should require 10 machine hours. According to the static budget, Access expected to incur the following:

500 machine hours per month (50 connectors x 10 machine hours per connector)

$7,000 in variable manufacturing overhead costs

$8,525 in fixed manufacturing overhead costs

During August, Access actually used 1,000 machine hours to make 120 connectors and spent $5,800 in variable manufacturing costs and $8,000 in fixed manufacturing overhead costs. Calculate the variable overhead efficiency variance for Access.