LONDON, July 10 (Reuters) - The Bill and Melinda Gates Foundation is set to unveil funding a sum in the hundreds of millions of dollars for a campaign to improve access to contraception in the developing world.

ACCRA, July 10 (Reuters) - Ghana's minor mid-cocoa output for the 2012 season is expected to fall 60 percent to 42,000 tonnes, compared with about 107,000 tonnes harvested in the previous seasons, three sources close to industry regulator Cocobod said on Tuesday.

GENEVA, July 10 (Reuters) - The Nigerian benchmark grade was steady on Tuesday as some buyers sought bargains after Qua Iboe fell to a more than two-year low of around dated plus $1 a barrel the previous session. Two Qua Iboe tankers from the August programme were heard sold this week, although traders said that several Nigerian cargoes remain unsold from the June and July programmes. An usual fixture was reported the previous session with a Nigerian tanker booked to Uruguay, traders sai

JOHANNESBURG, July 10 (Reuters) - A new law in Zambia limiting the use of dollars in everyday transactions has triggered a dramatic 8 percent rally in the kwacha in the past week, and other African countries struggling with weakening currencies are taking note.