Since a microscope lasts 25 years at least a small difference in price is easy to make up in a large increase in productivity.
(a microscope; lasts; 25 years) (at least a small difference in price; is; easy to make up in a large increase in productivity; T:Since a microscope lasts 25 years)
a microscope at least a small difference in price
lasts is
25 years
easy to make up in a large increase in productivity T:Since a microscope lasts 25 years