Karan needs to choose between two gym plans. he can either pay a \$150$150dollar sign, 150 joining fee and a \$10$10dollar sign, 10 monthly fee, or he can pay a \$50$50dollar sign, 50 joining fee and a \$30$30dollar sign, 30 monthly fee. on what month will the cumulative costs of the plans be equal, and what will those total costs be?