



 
Hi Kim, The volume of your rectangular box is 18 × 0.75 × 0.75 = 10.125 cubic inches. I looked on a unit conversion site and found that 1 cubic inch is 0.5541125541126 US fluid ounces. Hence the volume of your box is 10.125 × 0.5541125541126= 5.61fluid ounces. Penny  


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