Amazon.com Inc. says it will expand its hiring spree by an additional 75,000 workers as the online retailer shores up its logistics operation to meet demand from people hunkered down at home because of the coronavirus pandemic.

The company said on Monday that it had filled the 100,000 temporary and full-time positions it previously announced and that Amazon planned to bring on another 75,000 people. The company said the hiring spree and a temporary $2-an-hour wage boost would likely cost more than $500 million, up from a prior estimate of $350 million.

Online shopping has surged, particularly for staples like toilet paper and groceries. Meanwhile, Amazon is struggling with outbreaks of COVID-19 in its own ranks, with cases at dozens of logistics depots around the U.S., according to employees and media reports. Some workers say Amazon’s hiring has helped the company fill roles of employees who have stopped coming to work out of fear of contracting or spreading the virus.