Skinner's Produce buys fresh Boston lettuce daily for $1.20 a pound and sells it for $3.60 a pound. Any lettuce left over at the end of the day is disposed off at a cost (to Skinner) of $0.10 per unit. Skinner uses the single-period model to determine how much lettuce to buy at the beginning of each day. For this situation, Group of answer choices Co = $1.20 and Cu = $2.30 Co = $1.10 and Cu = $2.30 Co = $1.20 and Cu = $2.40 Co = $1.30 and Cu = $2.40