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Dear XXX, How are you doing? This is XXX from XXX company. Our customers had ordered the materials of serial numbers of F6B and CK54 from you. We would like to know what is the minimum quantity requirement, for example, serial numbers of F6B and CK54 60. Is the ordering quantity sufficient to meet your criteria? Any extra charges involved? If the ordering quantity is insufficient, then what would be the pricing under this situation/scenario? Many thanks for your attention in this matter. Yours Truly,XXX