Gematria Calculation Result for it doesnt add up saying origins on Roman Numeral

This is calculated by summing each letter's value: i(1) + t(0) + (0) + d(500) + o(0) + e(0) + s(0) + n(0) + t(0) + (0) + a(0) + d(500) + d(500) + (0) + u(5) + p(0) + (0) + s(0) + a(0) + y(0) + i(1) + n(0) + g(0) + (0) + o(0) + r(0) + i(1) + g(0) + i(1) + n(0) + s(0).