The total costs incurred in 20x3 at various levels in a factory have been measured as follows

output Total Cost

26 6566

30 6690

33 6783

44 6985

48 7380

50 7310

when output is 80 units or more, another factory unit must be rented and fixed costs therefore increase by 10%

Calculate the estimated total costs of producing 100 units in 20x4