I can't shop in ... 1000 rupees only.

Answer: No Article

Explanation

• The definite article 'the' is used for specific or previously mentioned nouns. Here no specific sum has been identified, so 'the' is not appropriate.

• The indefinite articles 'a' and 'an' are used with singular countable nouns. '1000 rupees' is plural, so neither 'a' nor 'an' can be used.

• Amounts expressed with a number plus a plural currency noun generally take no article. Example: "I can't shop with only 1000 rupees."

• Tip: You can make the sentence more natural by using 'with' and 'only': "I can't shop with only 1000 rupees." or "I can't buy anything with only 1000 rupees."