我想問:
1. 假如我有$10, 想買一排$10 o既朱古力, 但係我宜家可以選擇買或者唔買, 咁deal or not deal 呢個情況底下有冇機會成本o既存在?
2. 承上題, 咁假如我真係用左個$10 去買, 咁呢$10 係咪等於 the
highest valued alternative use of the money spent?
3. money cost = highest valued alternative use of the money spent = hightest valued option forgone, 呢3野樣係咪同樣意思?