。
She tried to make ends meet within her income.
Literal
She [topic-は] income within [with-で] manage [tried to-ようとした].
やりくりする means to manage finances, make do, or make ends meet — juggling limited resources to cover expenses. 収入内で (within her income) uses 内 (within/inside) and the instrumental で. ~ようとした (tried to) uses the volitional + とする pattern, expressing an attempt that may or may not have succeeded — the past tense した leaves the outcome ambiguous.