how to calculate the total overhead variance for this probleme ? thanks

Question 8 1 points Save Answe The predetermined overhead rate for Johnson Company is $5, comprised of a variable overhead rate of $3 and a fixed rate of $2. The amount of budgeted overhead costs at normal capacity of $150,000 was divided by normal capacity of 30,000 direct labor hours, to arrive at the predetermined overhead rate of $5. Actual overhead for October was $8,900 variable and $5,400 fixed, and 1,500 units were produced. The direct labor standard is 2 hours per unit produced. The total overhead variance is $1,800 F $700 F $700 U $1,800 U