An invoice for $$3,868,$ dated June $26,$ had terms $2/10,1/20,$ n$/45.$a$.$ What amount was credited for a payment of $$1,000$ on July $5?($Round your answer to the nearest cent.$)$Amount credited $ b$.$ What amount was credited for a payment of $$1,000$ on July $16?($Round your answer to the nearest cent.$)$Amount credited $ c$.$ What amount was credited for a payment of $$1,000$ on August $10?($Round your answer to the nearest cent.$)$Amount credited