Using the high-low method, determine the variable and fixed costs

Using the high-low method, determine the variable and fixed costs in Claiborne Company's cost structure from these data:
Month______ Number of Units___________ Costs
June....................6,000.....................$ 34,000
July....................9,000........................52,000
August...............12,000........................64,000
Variable cost per unit ________
Fixed Costs ________
What is the estimated total cost to produce 11,000 units? ________