In Example 3-Blue Box,pg 554 of Economics reading 11, Currency Exchange Rates: Understanding Equilibrium Value, current all-in bid rate for delivery of GBP against the CHF in three months for CHF/GBP currency pair is asked This is calculated by adding the forward points to the bid rate. But in part 2 of the question, the all-in rate to sell the CHF six months forward against the GBP is calculated by adding forward points to the ask rate. Why is that? I am confused.
Dealer will Buy at the Bid Rate
Dealer will Sell at the Ask Rate
Many thanks 
Yes, I realized that after posting the question