Refer to figure. 
Note: This question appears as a “type-in” in the UK CAA exam.

The upper vertical limit of the Straubing (EDMS) Class F airspace is 2 500 ft Above Ground Level (AGL) and the aerodrome's elevation is 1 054 ft.

The altimeter temperature error correction is given, 240 ft, because of flying within a cold atmosphere with an OAT of -7°C. The correction must be added, because the indicated altitude will be higher than the true altitude in a cold atmosphere.

The aircraft flies with an altimeter setting, 998 hPa, equal to the QNH of the Straubing aerodrome, thus no pressure correction is required.

Therefore, the minimum indicated altitude to clear the Straubing (EDMS) Class F airspace by 500 ft is: 2 500 ft + 1 054 ft + 240 ft + 500 ft = 4294 ft. After rounding up to the nearest 10 ft, the answer is 4300 ft.