{"id":"break-even-calculator","engine":"core","category":"math","name":"Break-even calculator","fields":[{"key":"fixed","label":"Fixed costs","type":"number","default":10000,"required":true,"min":0},{"key":"price","label":"Selling price per unit","type":"number","default":50,"required":true},{"key":"variable","label":"Variable cost per unit","type":"number","default":30,"required":true}],"sample":{"fixed":10000,"price":50,"variable":30}}