Table 3.--Wholesalers included in study: celery volume number of firms and weekly Market Area Firms Total Weekly Celery Volume No. Crates Philadelphia 5 14,000 Boston 4 13,500 Detroit 5 6,600 Total 14 34,100 Table 4.--Retailers and wholesalers included in study: size class in terms of weekly celery volume, total weekly volume and per- cent of each size class Size Class Retailers Wholesalers Number Weekly Volume Number Weekly Volume Crates Percent Crates Percent Small (Under 500 cr./wk.) 6 1,550 8 2 550 2 Medium (500-1,250 cr./wk.) 6 6,050 31 2 1,000 3 Large (Over 1,250 cr./wk,) 7 11,700 61 10 32,550 95 Total 19 19,300 100 14 34,100 100