(Reuters) -Amazon.com will invest more than $2.2 billion to bump up the pay of hourly workers in its fulfillment and transportation operations in the United States, the company said on Wednesday.

The base pay will increase by at least $1.50 to more than $22 per hour, the e-commerce firm said, adding that the increase translates to $3,000 per annum for staff working 40-hour weeks.

Amazon employs over 800,000 full-time and contract workers in these roles in the U.S., according to the company.