Yep, you guessed it! An Infant Price is added to the booking cost (per night) for each infant including in a given booking.

There are two options for child pricing:

Child Price (Nightly)
The price charged per night of the stay for each child that exceeds the ‘based on’ number that is specified in the Rate Type. For example, if the Rate Type is ‘based on two people sharing’, each child above an occupancy of two people will incur the Child Price (Nightly) – £10 in the above example.
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Child Price (Stay)
The single price added to the booking cost for each child above the ‘based on’ number that is specified in the Rate Type. For example, if the Rate Type is ‘based on two people sharing’, each child above an occupancy of two people will incur the Child Price (Stay) – £10 in the above example.