China Airlines has converted three options for Boeing 777 Freighters into firm orders, more than two months after it first inked a memorandum of understanding to take the freighters.

The airline states in a stock exchange disclosure that the total transaction value is estimated to be $1.06 billion, or about $352 million per aircraft.

This follows the firming up of orders for three 777Fs in late June. China Airlines said then that the total transaction value was around $1.06 billion.

The airline signed the memorandum of understanding with Boeing in May, in a deal comprising three firm-order aircraft and three options. The manufacturer then acknowledged the deal during the Paris air show in June.

China Airlines will use the 777Fs to replace its ageing 747-400Fs. Cirium’s Fleets Analyzer shows that the airline has 18 of those jets in operation, with three more in storage.