Table 18.--FOB shipping point and retail prices for 12 46-ounce cans of single-strength grapefruit juice, 1964-65 through 1976-77 seasons FOB FOB-retail margin FOB SRetail shipping price Perpointent n price tb Actual of retail price value -$ per case - Percent 1964-65 4.43 3.16 1.27 29 1965-66 4.67 3.29 1.3Q 30 lh66-67 4.03 2.69 1.34 33 1967-68 4.71 3.51 1.20 25 1968-69 4.50 3.07 1.43 32 1969-70 5.42 4.06 1.36 25 1970-71 5.74 4.40 1.34 23 1971-72 5.81 4.48 1.33 23 1972-73 5.60 4.12 1.48 26 1973-74 5.59 4.19 1.40 25 1974-75 5.91 4.34 1.57 27 1975-76 5.90 4.39 1.51 26 1976-77 6.52 5.25 1.27 19 As reported by Market Research Corporation of America [13]. As shown on processor's price cards.