Quoting Commentary for II Kings 12:12

וְנָתְנוּ֙ אֶת־הַכֶּ֣סֶף הַֽמְתֻכָּ֔ן עַל־יד [יְדֵי֙] עֹשֵׂ֣י הַמְּלָאכָ֔ה הפקדים [הַמֻּפְקָדִ֖ים] בֵּ֣ית יְהוָ֑ה וַיּוֹצִיאֻ֜הוּ לְחָרָשֵׁ֤י הָעֵץ֙ וְלַבֹּנִ֔ים הָעֹשִׂ֖ים בֵּ֥ית יְהוָֽה׃

And they gave the money that was weighed out into the hands of them that did the work, that had the oversight of the house of the LORD; and they paid it out to the carpenters and the builders, that wrought upon the house of the LORD,

Rashi

מתכנת — This word, and ותכן (v. 18), and the words of the same root in (I Samuel 2:3) “And by Him actions are counted (נתכנו)” and in (2 Kings 12:12) “the money that was counted (המתכן)”, all have the meaning of counting.
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Rashi

to the treasures Heb. לְתְּכוּנָה, to their treasures. [It is called תְּכוּנָה] because the silver and gold placed in the treasury is placed there with a count, as you say (II Kings 12:12): “The counted (הַמְתֻכּן) money.” [following Jonathan]
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Rashi

ותכן לבנים means THE NUMBER OF THE BRICKS; similar is (2 Kings 12:12) “the money המתכן”, i. e. the money which was counted, just as it states in that passage (v. 11), “and they put it up in bags and counted the money”.
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