consolidation under equity method

hy you all, i startedd studying with schweser notes, and i found something i dont quite get…under intercorporate investments there are equity and acquisition methods, and consloidation of balance sheet is explained on the last 2 pages of that topic, but questions after that session ask for consolidation under equity method (16,17,18 on 97. page), and then they in explanations do some thing that are not in the text, could someone explain how it is done, why net income is not added, at least 50%, why whole COGS is added…?

thank you in advance

p.s. sorry for grammar mistakes