Zan Azlett and Angela Zesiger have joined forces to start​ A&Z Lettuce​ Products, a processor of packaged shredded lettuce for institutional use. Zan has years of food processing​ experience, and Angela has extensive commercial food preparation experience. The process will consist of opening crates of lettuce and then​ sorting, washing,​ slicing, preserving, and finally packaging the prepared lettuce.​ Together, with help from​ vendors, they think they can adequately estimate​ demand, fixed​ costs, revenues, and variable cost per bag of lettuce. They think a largely manual process will have monthly fixed costs of $37,500 and variable costs of $1.60 per bag. A more mechanized process will have fixed costs of $75,000 per month with variable costs of $1.00 per bag. They expect to sell the shredded lettuce for $2.50 per bag.

Richardson hired j.c. flood company, a plumbing contractor, to correct a stoppage in the sewer line of her house. the plumbing company's 'snake' device, used to clear the line leading to the main sewer, became caught in the underground line. to release it, the company excavated a portion of the sewer line in richardson's backyard. in the process, the company discovered numerous leaks in a rusty, defective water pipe that ran parallel with the sewer line. to meet public regulations, the water pipe, of a type no longer approved for such service, had to be replaced either then or later, when the yard would have to be excavated again. the plumbing company proceeded to repair the water pipe. though richardson inspected the company's work daily and did not express any objection to the extra work involved in replacing the water pipe, she refused to pay any part of the total bill after the company completed the entire operation. j.c. flood company then sued richardson for the costs of labor and material it had furnished. (c) for what, if anything, should richardson be liable? explain."