The post explains how the waiter selected a knife and chopping board before he grabbed a lemon from the fridge and cut off a slice.
The reply added that the cost of rent, business rates, electricity and other overheads comes to £27.50 per hour of trading. It said waiting staff are also paid £12.50 an hour on top of that sum.
"Therefore, together the cost is £40 per hour or 67p per minute, meaning that the cost of providing you with 2-3 minutes of service was £1.34 - £2.00.
"Then the government add on VAT at 20% which takes the cost of that cup of fruit infusion to between £1.60 and £2.40 irrespective of whether you had a teabag costing one and a half pence or a slice of lemon costing five pence."
The response ends: "I accept that it makes the price of a cuppa in a city centre cafe look expensive compared to the one you make at home but unfortunately that’s the cruel reality of life.”