Some of the reported chemical concentrations of water at the pH 7.3 are the following: [Na+] = 65 mg/L, [Mg2+] = 19 mg/L, [Ca2+] = 35 mg/L, [Cl-] = 0.8 mg/L, [SO42-] = 14.3 mg/L. What is the total hardness of water in mg/L CaCO3?

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