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For Mistake To Be Lossless...

**What was the mistake?**
Let's assume that those things costs **a** and **b** respectively.

As per Bob's wrong calculation,

a / b = 5.25

**a = 5.25 b **..........(1)

And according to what should have been correct,

**a + b = 5.25**

Putting (1) in above,

5.25b + b = 5.25

6.25b = 5.25

**b = 0.84**

Again putting this value in (1) gives,

a + 0.84 = 5.25

a = 5.25 - 0.84

**a = 4.41**
** **

Hence the cost of 2 things are **$4.41** and **$0.84.**

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