"Dear Sir/ Madam,
Thanks for the email. I’m still interested to work with (company name) and I can wait till April I will be available from Monday to Friday, but I just want to know how much will be the pay of per pallet and one more thing I would like to confirm that there will be two working days?"
I suggest;
Dear Sir/ Madam,
Thank you for your email. I am still interested in working with (company name) and I can wait until April. I will be available for work from Monday to Friday inclusive. I would be grateful if you could let me know how much you pay per pallet. Finally, could you please confirm that you will be requring me to work two days a week?
Good luck