Robert and Susan entered into a partnership. Robert is a working partner who recieves 16.67% of the total profit for his services. The balance of the profit is split between the two partners in the ratio of their investments. Robert had invested $42,000 and recieved $6,120 totally and the company made a total profit of $11,520, how much did Susan invest in the business?
None of the above
Pls include reasoning along with all answer posts.
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