Osborn Manufacturing uses a predetermined overhead rate of $19.40 per direct labor-hour. This predetermined rate was based on a cost formula that estimates $256, 080 of total manufacturing overhead for an estimated activity level of 13, 200 direct labor-hours. The company actually incurred $ 251,000 of manufacturing overhead and 12, 700 direct labor-hours during the period. 1. Determine the amount of underapplied or overapplied overhead increase or decrease the company's gross margin? By how much