答：是的.
whatever一词叫连接代词,可以引导名词性从句,=anything that...
如：You can take whatever you like.=You can take anything that you like.
你可以拿走你喜欢的任何东西.whatever在宾语从句中作like的宾语.
Whatever还可以引导让步状语从句=No matter what...
此句就是这种用法.=No matter what it costs,I will buy one.不论这要耗费什么代价,我都要买一件（个.）
whatever在从句中作costs的宾语.