equity investments，schwester notes，study session 12 reading 43 课后题challenge problem 第22题，p216
题目中 beginning gross fixed assets=90, ending gross fixed assets=136
而后又说capital expenditure=65.

书中说capital expenditure=ending gross PPE-beginning gross PPE, 我认为PPE=fixed assets，可是为什么136-90不等于65呢？