Minimum Purchase Error

Product:Quantity:Price:Total:FE-SCANIA- Scania Marine Diesel 112 Size, 12 1/4" Diameter x 9" Tall Strait Cylinder Shape1  (Error)$13.50$13.50FEC-12- Caterpillar C-12, Size 8 3/4" Diameter x 10 1/16" Tall1  (Error)$13.50$13.50FE-3516B- Caterpillar 3516B, Size 8 3/4" Base Diameter x 14" Tall Cone Shape1  (Error)$14.00$14.00FE-MTU8v2000 MTU 8V200, Size - 19 1/4" Diameter x 15" Tall Strait Cylinder Shape1  (Error)$15.50$15.50FE-6170. Cummins 6170, Size, 13" Diameter x 9" Tall Strait Cylinder Shape1  (Error)$14.00$14.00FE-8N-5006 - Caterpillar 3208 300hp 1988 6" od x 9"5/8 Tall1  (Error)$13.00$13.00FE-196- GM Detroit 12V71 Natural and dual Turbo-2Brthr, Size - 9″ Base Diameter x 9″ Tall Cone shaped1  (Error)$15.00$15.00Error => Minimum Purchase quantity of 6 units required of each product within the product group. (Rule ID = 541)