Mrs$.$ Esposito, a petroleum engineer, earns an $$72,500$ annual salary, while Mr$.$ Esposito has no earned income. Under current law, the couple pays $20$ percent in state and federal income tax. Because of recent tax law changes, the couple$$s future tax rate will increase to $28$ percent. If Mrs$.$ Esposito decides to take a part$-$time job because of the rate increase, how much income must she earn to maintain the couple$$s after$-$tax disposable income?