Finally figured out ?

exercises/error_handling/errors2.rs

@@ -16,16 +16,20 @@
 // There are at least two ways to implement this that are both correct-- but
 // one is a lot shorter! Execute `rustlings hint errors2` for hints to both ways.
 
-// I AM NOT DONE
 
 use std::num::ParseIntError;
 
 pub fn total_cost(item_quantity: &str) -> Result<i32, ParseIntError> {
     let processing_fee = 1;
     let cost_per_item = 5;
-    let qty = item_quantity.parse::<i32>();
-
-    Ok(qty * cost_per_item + processing_fee)
+    let qty = item_quantity.parse::<i32>()/*?*/; 
+    // The slick answer is just skipping
+    // the match statement and putting a ? where I left it in the comments. 
+    // It does the same thing as the match statement below.
+    match qty { 
+    Ok(qty) =>  Ok(qty * cost_per_item + processing_fee),
+    Err(ParseIntError) => Err(ParseIntError),
+        }
 }
 
 #[cfg(test)]