Thanks you for your reply.
Item 2 about price&term of payment. we evaluation from as below.
Grade A (30 point) = The price lower than market and credit 30 day.
Grade B (20 point) = The price equal to the market and credit 30 days.
Grade C (10 point) = The price equal to the market and cash payment.
Grade D ( 5 point) = The price higher than the market and cash payment.