Utilize the input text as a context reference, choose the right relationship between Codelco and copper from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

We reached an agreement earlier this month with Codelco to repay $7.3 million due to them in respect of negative trade settlement adjustments, which were caused by the sharp drop in copper price in Q1.

Answer: product_or_material_produced