diff --git a/M01_MasterData/EasyCalc/M01_EasyCalc_Pick.ts b/M01_MasterData/EasyCalc/M01_EasyCalc_Pick.ts
index 570e67dda..bc0258535 100644
--- a/M01_MasterData/EasyCalc/M01_EasyCalc_Pick.ts
+++ b/M01_MasterData/EasyCalc/M01_EasyCalc_Pick.ts
@@ -15,12 +15,14 @@ import {
 } from "@ui/ui_template_elements";
 import { openModal } from "@ui/ui_template_modal";
 import { fetchPick, fetchSubs, type SubInfo } from "../M01_MasterData_Api_Fetch";
-import { fetchMaterials } from "../M01_MasterData_UI_Logic_Api";
+import { fetchMaterials, type ElementBrief } from "../M01_MasterData_UI_Logic_Api";
 import { listEasy, listMachines, machineElement, plainError } from "./M01_EasyCalc_Api";
 import type { PickResult } from "./M01_EasyCalc_Model";
 import "./M01_EasyCalc_Pick.css";
 
 type Kind = PickResult["kind"];
+/** 후보 줄 — 서버는 구분 · 상세구분도 주지만 ElementBrief 타입에는 없음 */
+type Brief = ElementBrief & { 구분?: string; 상세구분?: string };
 
 const TEXT = {
   Title: ["넣을 것 고르기", "Pick what to add"],
@@ -136,13 +138,13 @@ const SOURCES: Partial<Record<Kind, Source>> = {
         ? await fetchPick("price", f.q).then((r) => ({
             total: r.total,
             items: r.items
-              .filter((it) => !f.sub || (it as { 구분?: string }).구분 === f.sub)
-              .map((it) => ({ ...it, 구분: (it as { 구분?: string }).구분, 상세구분: undefined })),
+              .filter((it) => !f.sub || (it as Brief).구분 === f.sub)
+              .map((it) => ({ ...it, 구분: (it as Brief).구분 })),
           }))
         : await fetchMaterials({ sub: f.sub, ...(f.detail ? { detail: f.detail } : {}) }).then(
             (r) => ({
               total: r.total,
-              items: r.items.map((it) => ({ ...it, 구분: it.구분 ?? f.sub })),
+              items: r.items.map((it) => ({ ...it, 구분: (it as Brief).구분 ?? f.sub })),
             }),
           );
       return {
@@ -153,7 +155,7 @@ const SOURCES: Partial<Record<Kind, Source>> = {
           const unit = typeof it.단위 === "string" ? it.단위 : "";
           const price = num(it.값);
           const element: Record<string, string> = { 구분: it.구분 ?? f.sub };
-          const detail = (it as { 상세구분?: string }).상세구분;
+          const detail = (it as Brief).상세구분;
           if (detail) element["상세구분"] = detail;
           element["검색어"] = `${name} ${spec}`.trim();
           return {