The document defines several types of costs related to production including: 1) Money cost, which is the amount spent in money terms for production. 2) Real cost, which includes mental and physical sacrifices made during production. 3) Explicit cost, which are actual cash payments made for factor and non-factor inputs. 4) It also distinguishes between fixed costs that remain constant regardless of output, and variable costs that vary with output. Total cost is the sum of fixed and variable costs.