A company’s flexible budget for last month shows that actual indirect materials cost, an overhead variable cost, was $31,178, and that the rate variance for indirect materials cost was $2,261 unfavorable. The company uses machine hours as its cost-allocation base for allocating manufacturing overhead. During that month, the company worked 11,900 machine-hours. Budgeted activity for the month had been 12,200 machine-hours. What must have been the standard rate per machine-hour for indirect materials?