6. Bright Smiles, Inc. produces toothbrushes. In June, they produced 14,000 units. Total variable costs were $56,000 and fixed costs totaled $28,000 and sunk costs were $15,000 in May. In July they produced 17,500 units therefore, in July: A) variable costs in total will be $56,000. B) variable costs per unit will be $4. C) variable costs per unit will be $3.20. D) total fixed costs will be $35,000