"whose purchase" is correct and usable in written English.
You would use this phrase when referring to something that was bought by a specific person or group of people. For example: "The museum has acquired several new works of art, whose purchase was funded by enthusiastic donors."
Some of the biggest purchasers of U.S. weapons were Middle Eastern nations, including Saudi Arabia, whose purchase of 84 advanced F-15 fighters in part accounted for a $30 billion bill.
So, too, might EDS, whose purchase of A.T. Kearney, another consulting firm, has not worked well.
A lower-ticket item, but one whose purchase can also be delayed, is carpet.
Ellison, whose purchase of the tournament allowed it to stay here, is considered something of a savior for the event.
After a police raid on its Icelandic headquarters, Baugur sold him its stake (whose purchase features prominently in the charges), bought some minor retailers and went after supermarkets.
Their bombs were concocted from inexpensive everyday items whose purchase set off no alarms: pressure cookers, nails and ball bearings, gunpowder from fireworks and remote controls for toys.
A library of 13,918 structures from CSD representing 11,057 compounds were finally compiled, whose purchasing information is annotated by ZINC purchasable database.
Ms. Cintron — whose purchases at Woodbury Common include Kasper suits and Dooney & Bourke handbags.
The distributors will also be asked to note the pharmacies whose purchases exceeded certain limits.
Confident consumers, whose purchases account for two-thirds of the economy, may still lead the economy.
Her 6.8m YouTube subscribers, whose purchases ensured that the novel broke sales records, simply did not care.
