Given a text, write a compressed version of it in a single sentence.

According to Upjohn's estimates, only 50 % to 60 % of the 1,100 eligible employees will take advantage of the plan. Upjohn further estimated that about 50 % of the employees who leave for early retirement may be replaced.
Upjohn's estimates, 50 % to 60 % of 1,100 eligible employees will take advantage of the plan. Upjohn estimated that 50 % of employees who leave may be replaced.