Applying for Multiple Visas

Our business is planning a trip for approximately 60 employees to visit a factory in Changzhou. We will also tour while in China (Beijing, Shanghai, Guilin). Can I bring all 60 applications into the CVASC office in Calgary? Do I need a letter authorizing me to submit the applications on their behalf? From reading this website, I am thinking that we will need to apply for "L" Type. Is this correct? We will be in PRC for approximately 10 days. Am I correct in assuming that the cost will be Visa Fee + Application Service Fee + Postal Fee = $100 + $42 + $20 = $162 per person?