Lumberjacking/Capentry

i add more logs on my lumberjacking system, but i don´t know how i add this new logs in my carpentry system.
thanks.
Item 0x1c15
{
Name yewlog
desc tora%s% elfica%s%
graphic 0x1bdd
color 576
VendorSellsFor 5
VendorBuysFor 1
}
thanks.