The number of cells per mL of insect hemolymph was determined using a hemocytometer. Data from the hemocytometer count are listed below. The data represent the number of cells that were counted in each of the 5 squares of each chamber of the hemocytometer. What is the cell concentration (number of cells/mL) in the hemolymph?
Chamber A: 17; 15; 18; 22; 24
Chamber B: 29; 16; 25; 20; 18