Parts Purchasing: Comparing Pack Sizes and Landed Cost

Parts Purchasing: Comparing Pack Sizes and Landed Cost

Original quantitative topic practice in English. All 24 questions are included in a shuffled order. Each question supplies its own data and model assumptions; use only those assumptions. Choose one answer. Practice target: 20/24, not an official examination pass mark. Keep full intermediate precision. These exercises cover the calculation scope in the title; they do not constitute a full Red Seal examination, trade qualification, site design or operating specification.
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A job needs 93 items. Supplier A sells packs of 12 for $42 per pack with $18 freight per order. Supplier B sells packs of 20 for $65 per pack with $30 freight. Buy whole packs only. There are no discounts or taxes. Landed order cost includes all purchased items and freight, including surplus stock. Calculate the surplus items if A is chosen. Keep intermediate values unrounded; round the final answer to 4 decimal places if needed.