A mine needs to renew a mill. With the quotes received, the attached table has been prepared, which summarizes the relevant factors for the selection of the supplier.

Factor	Supplier A	Supplier B	Supplier C
Guarantee	36 months	24 months	18 months
Annual sales	$70500 000	$95000 000	$45000 000
Method of payment	Invoice at 180	Invoice at 90	Invoice at 360
Price	$360 000	$450 000	$270 000

As part of the selection process, it has been considered that the weightings of the technical and economic proposals are 0.60 (guarantee 0.3 and sales 0.3) and 0.4 (payment method 0.20 and price 0.20), respectively.

They have also developed the following technical scoring reference values:

Factor	Variable	Points
Guarantee	Warranty period 24 months 24 months > Warranty period 12 months Warranty period < 12 months	45 20 5
Supplier experience (in annual sales)	Equipment sales $50,000,000 $50,000,000 > Equipment sales $30,000,000 Equipment sales < $30,000,000	35 15 10
Payment facilities	Invoice payment period 360 days 360 days > Invoice payment period 120 days Invoice payment period < 120 days	40 25 10
Price	Amount <= 300,000 400,000 Amount 300,000 Amount 400,000	30 20 10

With the information provided, you are asked to evaluate the quotes and indicate the best proposal. Use some purchasing evaluation methodology