Between them they contribute R300 (that is, R220+R80).
Brandon is contributing 220/300=11/15 of the total contribution while Melissa is contributing 80/300=4/15 (=1-11/15).
They each receive a proportion of the profit R1776 associated with their proportions of their contribution.
Brandon receives (11/15)1776=R1302.40 and Melissa (4/15)1776=R473.60.