Gematria Calculation Result for zimm be losing left arm mmxiii on Roman Numeral

This is calculated by summing each letter's value: z(0) + i(1) + m(1000) + m(1000) + (0) + b(0) + e(0) + (0) + l(50) + o(0) + s(0) + i(1) + n(0) + g(0) + (0) + l(50) + e(0) + f(0) + t(0) + (0) + a(0) + r(0) + m(1000) + (0) + m(1000) + m(1000) + x(10) + i(1) + i(1) + i(1).