￥70,000 ￥150,000￥100,000￥66,667￥44,444￥29,44429,444 4 ￥120,000￥100,000 ￥80,000￥60,000￥40,000￥20,000￥70,000 1 2 3 4 5 ￥150,000 ￥100,000 ￥66,667 ￥44,444 ￥29,444 29,444 1 2 3 4 5 6 ￥120,000 ￥100,000 ￥80,000 ￥60,000 ￥40,000 ￥20,000