The lifetime of a printer costing $140 is exponentially distributed with mean 2.62 years. The manufacturer agrees to pay a full refund to a buyer if the printer fails during the first half year...

please explain with steps and check your work, thank you so much! (2):)

Extracted text: The lifetime of a printer costing $140 is exponentially distributed with mean 2.62 years. The manufacturer agrees to pay a full refund to a buyer if the printer fails during the first half year following its purchase and a one-half refund if it fails during the second half year. If the manufacturer sells 320 printers, how much should it expect to pay in refunds? $