Concept:Perform the addition and subtraction in order from left to right, then round the final result to two decimal places.Explanation:First, subtract 34.624 from 75.0785.75.0785−34.624=40.4545Next, add 9.83 to the result.40.4545+9.83=50.2845Now round 50.2845 to two decimal places.Look at the third decimal digit, which is 4.Since 4<5, the second decimal digit remains unchanged.Therefore, 50.2845≈50.28.Answer:50.28Correct option: C. 50.28