1. Let's clarify the problem: You want to find the sum of visiting times, which you say totals 2990. 2. To help you better, I need to know the individual visiting times or the formula used to calculate the sum. 3. If you have a list of visiting times $t_1, t_2, \ldots, t_n$, the sum is calculated as: $$\text{Sum} = \sum_{i=1}^n t_i$$ 4. If you have a formula or pattern for the visiting times, please provide it so I can assist in verifying or calculating the sum. 5. Without additional details, I can only confirm that if the sum is 2990, then: $$\sum_{i=1}^n t_i = 2990$$ 6. Please provide more information or the data to proceed with detailed steps and verification.