Effective Yield. Fort Collins, Inc., has $1 million in cash available for 30 days. It can earn 1% on a 30 day investment in the U.S. Alternatively, if it converts the dollars to Mexican pesos, it can earn 1 1/2% on a Mexican deposit. The spot rate of the Mexican peso is $.12. The spot rate 30 days from now is expected to be $.10. Should Ft. Collins invest its cash in the U.S. or in Mexico? Substantiate your answer.