diff --git a/src/main/java/cokr/xit/adds/cmmn/xls/FormatMaker.java b/src/main/java/cokr/xit/adds/cmmn/xls/FormatMaker.java
new file mode 100644
index 0000000..efe63d6
--- /dev/null
+++ b/src/main/java/cokr/xit/adds/cmmn/xls/FormatMaker.java
@@ -0,0 +1,16 @@
+package cokr.xit.adds.cmmn.xls;
+
+import java.util.Map;
+
+import cokr.xit.base.docs.xls.Format;
+
+public class FormatMaker {
+
+	@SuppressWarnings("rawtypes")
+	public static Format a_slash_ab(Format format, String a, String b) {
+		return format.of(a).value(o -> {
+			return ((Map) o).get(a) + " / " + ((Map) o).get(a+b);
+		});
+	}
+
+}