Take context from the input text and decide on the accurate relationship between 'Fonterra' and 'milk' from the options provided.
Options: developer, director/manager, product/material produced, employer

Fonterra has slashed its 2014-15 forecast for its New Zealand farmers by NZ10¢ to $NZ4.50 ($4.23) per kilogram of milk solids, the lowest level in eight years.
product/material produced