English Bus/Financial Accounting Mergers & Acquisitions

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A. Representation/warranty on basis of preparation of financial statements.

(a) Sellers have delivered to Buyer the audited balance sheets of the Company dated [date 1] and [date 2], and the related statements of income, shareholder’s equity, and cash flows for the fiscal years then ended. Each of these financial statements (i) is complete and correct in all material respects; ...and (iv) reflects all liabilities, including taxes, of the Company as of the date thereof. The inventory valuations in each of such financial statements are based on the principal of inventories at weighted average cost or ***market*** for a number of years, with all obsolete or unusable or not readily salable inventories having been either eliminated of properly written down.
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My understanding is that "market" is related to the preposition "at" in front of "weighted average cost", so if we ignore "weighted average cost" for convenience, the sentense will be rewriten as:

"The inventory valuations in each of such financial statements are based on the principal of inventories at market for a number of years..."

Supposing the nuderstanding above is correct, what does the phrase "at market" mean?
Does it mean "at market value"?