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Sye Chase started and operated a small family architectural firm in Year $1.$ The firm was affected by two events: $(1)$ Chase provided $$24,100$ of services on account, and $(2)$ he purchased $$7,800$ of supplies on account. There were $$900$ of supplies on hand as of December $31,$ Year $1.$

d$.$ Explain why the amounts of net income and net cash flow from operating activities differ.

$\backslash$table$[[$Net income is$,$; Net Cash Flow from Operating Activities is$],[$of supplies were used, but none were paid for.,$]]$