Minimum Purchase Error

Product:Quantity:Price:Total:FE-185- Detroit 16V92 Dual Turbo and 60 series, size - 10″ Base Diameter x 14″ Tall Cone Shaped2  (Error)$15.50$31.00FE-196- GM Detroit 8V92 dual turbo DDC, Size - 9″ Base Diameter x 9″ Tall cone shaped1  (Error)$15.00$15.00FE-182- 375 hp, John Deer, Size - 10″ Diameter x 12″ Tall1  (Error)$13.50$13.50FE-VOLVO PENTA, size - 8" Diameter x 3 3/4" Tall1  (Error)$14.50$14.50FE-195- Caterpillar 3116 Single Turbo, Size 7 1/2" Base Diameter x 8" Tall Cone1  (Error)$13.00$13.00FE-195- Detroit 8.2 Single Turbo, size - 7 1/2″ Base Diameter x 8″ Tall Cone shaped1  (Error)$14.00$14.00FE-189- Detroit Diesel 16V149, size - 12″ Diameter x 14″ Tall Cylinder shaped1  (Error)$14.00$14.00Error => Minimum Purchase quantity of 6 units required of each product within the product group. (Rule ID = 541)