|About Samurai. (4)|
|I will ask my host family some questions. (2)|
|How do you increase your vocabulary? (4)|
|Do you know prime cost? (6)|
|A picnic under the cherry blossoms. (5)|
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Do you know prime cost of close goods? French fries are sold from 2.4 dollar. The prime cost is 15 cent! Contact lens are sold from 200 to 300 dollar. The prime is 30 cent! It's large profit, isn't is?