As I commented to another recent poster from the Phils, there is no magic number to show in a bank account. But, as
@scylla noted, it should be enough to cover all travel, food and accommodation costs. In your case, for 2 weeks, the amount should not be all that much, but I suppose the IRCC might look for something in the range of P200,000, plus air travel cost (maybe in the range of P80,000 for that item). As well, better if it does not appear that the visit will use up all your savings.
The IRCC looks for steady employment, as one tie for returning to the RP, and it seems you have that. A letter from the employer allowing you 2 weeks vacation for the trip would help support the application. It would also help if you have travelled in the past to countries that require visas, such as USA, UK, Australia, N. Zealand.
As for the "payroll account", that is not something in am really familiar with. I take it it's in the employer name and not yours, yet segregated funds there are yours. You could show it and send a letter of explanation to the IRCC. Maybe better to show it and then show you transferred the money to an account you open in your own name. While that would show as a very recent account, it should be apparent that the funds came from the payroll account and that you have always had control over the funds.