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a) The purchase of supplies, equipment, and materials, when the expenditure required exceeds fifty thousand dollars ($50,000), shall be by contract let, in the district’s discretion, either to the lowest responsible bidder or to the responsible bidder that submits a proposal that provides the best value to the district. “Best value” means the overall combination of quality, price, and other elements of a proposal that, when considered together, provide the greatest overall benefit relative to the requirements described in the solicitation documents. (

b) The construction of facilities and works, when the expenditure required exceeds ten thousand dollars ($10,000), shall be by contract let to the lowest responsible bidder. (

c) The district shall obtain a minimum of three quotations, either written or oral, that permit the comparison of prices and terms in either of the following circumstances:

(1) In the case of the purchase of supplies, equipment, or materials, if the expected cost of procurement required exceeds five thousand dollars ($5,000) and does not exceed fifty thousand dollars ($50,000).

(2) In the case of the construction of facilities and works, if the expected cost of procurement required exceeds five thousand dollars ($5,000) and does not exceed ten thousand dollars ($10,000). (

d) Notice requesting bids shall be published at least once in a newspaper of general circulation, which publication shall be made at least days before bids are received. (

e) The board may reject any and all bids and readvertise in its discretion.