** Shares of Reckon RKN.AX rise as much as 1.8% to A$0.570, their highest since Dec. 11

** Co has signed an agreement with Money Managment Group and its British unit to purchase accounting software businesses Cashflow Manager and OKKE

** Deal for A$8.75 million ($5.54 million), accretive to earnings

** Expects businesses to contribute A$1 million of net profit after tax in FY25

** Stock posts its biggest intraday percentage gain since Dec. 10

** 77,034 shares change hands, compared with the 30-day average volume of 49,574

** Stock has fallen 0.88% this year, as of last close

($1 = 1.5788 Australian dollars)

(Reporting by Nichiket Sunil in Bengaluru)

((Nichiket.Sunil@thomsonreuters.com))