🧒你是今天的老板You are the owner today 先猜一猜，再改变数字，看看钱去了哪里。这里没有唯一正确的公司。Predict first, change a number, then follow the money. There is no single perfect business.
设计你的小公司Design your business
每次只改一个数字，更容易看出它带来了什么变化。Change one number at a time so its effect is easier to see.
1你想开什么公司？What will you build?
2给公司一个名字Name your company
3做四个重要决定Make four important choices
一个月的经营结果One month of business
收入RevenueRevenue
−
全部成本Total costCost
=
利润ProfitProfit
钱从哪里来，又去了哪里？Where did the money come from and go?柱子越高，金额越大Taller means more money
进阶挑战：至少卖多少才不亏？Challenge: How much must you sell to avoid a loss?
一次只改变一件事Change one thing at a time
先选问题，再猜结果。猜错没有关系，重要的是找到原因。Choose a question and predict. A wrong guess is useful when you explain why.
1先选一门生意Choose a business
?你猜会怎样？What do you predict?
▶选择一种情况Choose a case
三种情况放在一起比较Compare all three cases together
收入、成本和利润怎么变？How do revenue, cost and profit change?