Solve the problem

A large department store has collected the following monthly data on lost sales revenue due to theft and the number of security guard hours on duty: Lost Sales Lost Sales Revenue Total Security Revenue Total Security ($000s) Guard hours ($000s) Guard hours 1.0 600 1.8 950 1.4 630 2.1 1300 1.9 1000 2.3 1350 2.0 1200 Find the estimated lost sales revenues if the total number of security guard hours is 800. O a. 1.253 O b. 1.539 O c. 1.892 O d. 1.498