How Much Will It Cost?

1) What will be the charge for a 2 minute 20 second call to Thailand using the 0207 access number? 

Call is rounded to 3 minutes, so (3 min x 4p) + (4p connection) = 16p

2) What will be the charge for a 2 minute 20 second call to Thailand using the 0800 access number?

Call is rounded to 3 minutes, and incurs a 2p surcharge per minute for 0800 access, so (3 min x (4p+2p)) + (4p connection) = 22p

3) What will be the charge for a 2 minute 20 second call to Thailand using the 0800 access number from a payphone?

Call is rounded to 3 minutes, and incurs a 20p surcharge per minute for payphone access, so (3 min x (4p+20p)) + (4p connection) = 76p