Поставьте глаголы, стоящие в скобках,в правильной форме.
1) When the sellers quote prices they usually (to state) on what terms they (to deliver) the goods.
2) They also state at what prices the goods ( to deliver)
3) If the goods (to offer) on fob terms the price will cover the cost of the goods and transportation expenses to the port of shipment
4) A lot of documents (to involve) in business transactions.