Please show excel functions.

I Standard Cost Variance Analysis - Variable Manufacturing Overhead Standard Hours Allowed for Actual Output at Standard Rate Actual Hours of Input, at Standard Rate Actual Hours of Input, at Actual Rate Variable overhead efficiency variance Variable overhead rate variance Using formulas, compute the amount of the unit cost difference that is traceable to each of the variances computed above. Materials: Quantity variance Price variance Labor: Efficiency variance Rate variance Variable overhead: Efficiency variance Rate variance Excess of actual over standard cost per unit