Modify Opencart Site

Hello,

We are finishing our Site, which is based on Opencart 2.0 with Multimerch add-on and since the freelancer we have worked with and who has made some custom work for us does not have time to do some more work, we are contacting you.

If you are interested to do some minor coding for our Site, we can send you our TO DO document. Just for your impression, what we would like to be done:
1. Search field on Homepage (changing the position and finding the bug which prevents it from working)
2. implement 2 conditions that allow product submission along with warnings if those condition are not met
3. fixing the wrong mathematics, by implementing some variables that were implemented in previous custom work into the mathematical equations

Please inform us as soon as possible if you are interested. Since we are approaching our deadline, we would like the job to be done as soon as possible.