Montour Company has determined a standard variable overhead rate of \($1.10\) per direct labor hour and expects 1 labor hour per unit produced. Last month, Montour incurred 1,900 actual direct labor hours in the production of 2,000 units. The company has also determined that its actual variable overhead rate is \($1.20\) per direct labor hour. Calculate the variable overhead rate and efficiency variances as well as the total amount of oven or underapplied variable overhead.