A materials manager is analyzing the relationship between order costs and average quantity per order. She believes the relationship may be non-linear because order processing costs decrease as the quantity increases, and holding costs decrease as the quantity increases. The attached data set has monthly data over 36 months.

Fit a quadratic model that predicts cost based on quantity. Based on this model what is the predicted cost if order quantity is 371? Round your answer to 1 decimal place.

Time Per Unit	Unit Number
18.30	3
17.50	5
12.80	8
11.30	12
10.00	17
8.50	21
8.90	24
8.70	27
8.10	30
8.20	32
8.30	37
7.60	39
6.90	41
7.30	44
7.20	48
7.00	52
7.10	54
6.30	58
6.60	60
6.50	64
6.80	67
6.90	69
6.20	75
6.10	78
6.00	82
5.70	87
5.90	90
5.80	92
5.70	96
5.60	100