Johnathan is hosting a barbeque for 7 of his friends. He wants to buy twice as many sausages as burgers and the same number of buns as sausages and burgers combined.

Buns come in a packet of 6

Sausages come in a pack of 10

Burgers come in a pack of 8.

What is the smallest number of packets of buns that Johnathan could buy?